%%
%% This is file `latex-lab-amsmath.ltx',
%% generated with the docstrip utility.
%%
%% The original source files were:
%%
%% latex-lab-amsmath.dtx  (with options: `kernel')
%% 
%% This is a generated file.
%% 
%% Copyright 2021-2025 LaTeX Project
%% 
%% This file was generated from file(s) of the  `LaTeX-lab Bundle'.
%% ------------------------------------------------------------------------------------
%% 
%% It may be distributed and/or modified under the
%% conditions of the LaTeX Project Public License, either version 1.3c
%% of this license or (at your option) any later version.
%% The latest version of this license is in
%%    http://www.latex-project.org/lppl.txt
%% and version 1.3c or later is part of all distributions of LaTeX
%% version 2008 or later.
%% 
%% This file may only be distributed together with a copy of the LaTeX
%% `LaTeX-lab Bundle'. You may however distribute the `LaTeX-lab Bundle'
%% without such generated files.
%% 
%% The newest sources can be found below
%% 
%%    https://github.com/latex3/latex2e/required/latex-lab
%% 
%% where one can also log issues in case there are any.
%% 
%% 
%% File: latex-lab-amsmath.dtx
\ProvidesFile{latex-lab-amsmath.ltx}
        [2025-06-20 v0.1h amsmath adaptions]
\RequirePackage{tagpdf-base}
\ExplSyntaxOn
\AddToHook{begindocument}
 {
   \def\measuring@true{\let\ifmeasuring@\iftrue\tag_suspend:n{\measuring}\luamml_ignore:}
 }
\def\maketag@@@#1
  {%
    \ifmeasuring@
      \hbox{\m@th\normalfont#1}%
    \else
      \UseTaggingSocket{math/display/tag/begin}
      \hbox{\m@th\normalfont#1
      \UseTaggingSocket{math/luamml/mtable/tag/save}
      }%
      \UseTaggingSocket{math/display/tag/end}
    \fi
   }
\def\maketag@@@notag#1{\hbox{\m@th\normalfont#1}}
\DeclareRobustCommand{\eqref}[1]
  {\textup{\let\maketag@@@\maketag@@@notag\tagform@{\ref{#1}}}}
\def\common@align@ending {
  \math@cr \black@\totwidth@
  \UseExpandableTaggingSocket {math/luamml/mtable/finalize} {\@currenvir}
  \egroup
  \ifingather@
    \restorealignstate@
    \egroup
    \nonumber
    \ifnum0=`{\fi\iffalse}\fi
  \else
    \dollardollar@end
  \fi
  \ignorespacesafterend
}
\renewenvironment{align}{%
  \start@align\@ne\st@rredfalse\m@ne
}{%
  \common@align@ending
}
\renewenvironment{align*}{%
  \start@align\@ne\st@rredtrue\m@ne
}{%
  \common@align@ending
}
\renewenvironment{alignat}{%
  \start@align\z@\st@rredfalse
}{%
  \common@align@ending
}
\renewenvironment{alignat*}{%
  \start@align\z@\st@rredtrue
}{%
  \common@align@ending
}
\renewenvironment{flalign}{%
  \start@align\tw@\st@rredfalse\m@ne
}{%
  \common@align@ending
}
\renewenvironment{flalign*}{%
  \start@align\tw@\st@rredtrue\m@ne
}{%
  \common@align@ending
}
\renewenvironment{xalignat}{%
  \start@align\@ne\st@rredfalse
}{%
  \common@align@ending
}
\renewenvironment{xalignat*}{%
  \start@align\@ne\st@rredtrue
}{%
  \common@align@ending
}
\renewenvironment{xxalignat}{%
  \start@align\tw@\st@rredtrue
}{%
  \common@align@ending
}
  \math_register_halign_env:nn {align}{}
  \math_register_halign_env:nn {align*}{}
  \math_register_halign_env:nn {alignat}{}
  \math_register_halign_env:nn {alignat*}{}
  \math_register_halign_env:nn {flalign}{}
  \math_register_halign_env:nn {flalign*}{}
  \math_register_halign_env:nn {xalignat}{}
  \math_register_halign_env:nn {xalignat*}{}
  \math_register_halign_env:nn {xxalignat}{}
\def\align@preamble{%
   &\hfil
    \strut@
    \setboxz@h
      {
        \@lign
         $
          \m@th\displaystyle{##}
         \ifmeasuring@
          \luamml_ignore:
         \else
          \UseTaggingSocket{math/luamml/save/nNn}{ {} \displaystyle {mtd} }
         \fi
         $
      }%
    \ifmeasuring@
      \savefieldlength@
    \else
      \UseTaggingSocket{math/luamml/mtable/finalizecol}{box}
    \fi
    \set@field
    \tabskip\z@skip
   &\setboxz@h
      {
        \@lign
         $
           \m@th\displaystyle{{}##}
           \ifmeasuring@
           \luamml_ignore:
           \else
           \UseTaggingSocket{math/luamml/save/nNn}{ {} \displaystyle {mtd} }
           \fi
         $
      }%
    \ifmeasuring@
      \savefieldlength@
    \else
      \UseTaggingSocket{math/luamml/mtable/finalizecol}{box}
    \fi
    \set@field
    \hfil
    \tabskip\alignsep@
}
\def\math@cr@@@align{%
  \ifst@rred\nonumber\fi
  \if@eqnsw \global\tag@true \fi
  \global\advance\row@\@ne
  \add@amps\maxfields@
  \omit
  \kern-\alignsep@
  \iftag@
    \setboxz@h{\@lign\strut@{\make@display@tag}}%
    \place@tag
  \fi
  \UseTaggingSocket{math/luamml/mtable/tag/set}
  \ifst@rred\else\global\@eqnswtrue\fi
  \global\lineht@\z@
  \cr
}
\def\gather@#1{%
    \ingather@true \let\split\insplit@
    \let\tag\tag@in@align \let\label\label@in@display
    \chardef\dspbrk@context\z@
    \intertext@ \displ@y@ \Let@
    \let\math@cr@@@\math@cr@@@gather
    \gmeasure@{#1}%
    \global\shifttag@false
    \tabskip\z@skip
    \global\row@\@ne
    \halign to\displaywidth\bgroup
        \strut@
        \setboxz@h
          {
           $\m@th\displaystyle{##}
            \UseTaggingSocket{math/luamml/save/nNn}{ {} \displaystyle {mtd} }
           $
          }%
        \UseTaggingSocket{math/luamml/mtable/finalizecol}{box}
        \calc@shift@gather
        \set@gather@field
        \tabskip\@centering
       &\setboxz@h{\strut@{##}}%
       \place@tag@gather
       \UseTaggingSocket{math/luamml/mtable/tag/set}
        \tabskip \iftagsleft@ \gdisplaywidth@ \else \z@skip \span\fi
        \crcr
        #1%
}
\def\endgather{
      \math@cr
      \black@ \totwidth@
      \UseExpandableTaggingSocket{math/luamml/mtable/finalize} {gather}
  \egroup
  \dollardollar@end
  \ignorespacesafterend
}
\renewenvironment{gather*}
 {
   \start@gather\st@rredtrue
 }
 {
    \math@cr
    \black@\totwidth@
    \UseExpandableTaggingSocket{math/luamml/mtable/finalize} {gather}
   \egroup
   \dollardollar@end
   \ignorespacesafterend
 }
\math_register_halign_env:nn {gather}{}
\math_register_halign_env:nn {gather*}{}
\renewcommand{\start@aligned}[2]{
  \RIfM@
  \else
    \nonmatherr@ {\begin{\@currenvir}}
  \fi
  \savecolumn@ % Assumption: called inside a group
  \UseTaggingSocket{math/luamml/annotate/false}{}{ \alignedspace@left }
  \ams@start@box {#1} \bgroup
    \maxfields@ #2 \relax
    \ifnum \maxfields@ > \m@ne
      \multiply \maxfields@ \tw@
      \let \math@cr@@@ \math@cr@@@alignedat
      \alignsep@ \z@skip
    \else
      \let \math@cr@@@ \math@cr@@@aligned
      \alignsep@ \minalignsep
    \fi
    \Let@ \chardef \dspbrk@context \@ne
    \default@tag
    \spread@equation % no-op if already called
    \global \column@ \z@
    \ialign \bgroup
      & \column@plus
        \hfil
        \strut@
        $
          \m@th
          \displaystyle
          {##}
          \UseTaggingSocket{math/luamml/save/nNn}{ {} \displaystyle {mtd} }
        $
        \UseTaggingSocket{math/luamml/mtable/finalizecol}{last}
        \tabskip \z@skip
      & \column@plus
        $
          \m@th
          \displaystyle
          {
            {}
            ##
          }
          \UseTaggingSocket{math/luamml/save/nNn}{ {} \displaystyle {mtd} }
        $
        \UseTaggingSocket{math/luamml/mtable/finalizecol}{last}
        \hfil
        \tabskip\alignsep@
      \crcr
      \ams@return@opt@arg
}
\renewenvironment{gathered}[1][c]{%
    \RIfM@\else
        \nonmatherr@{\begin{gathered}}%
    \fi
    \UseTaggingSocket{ math/luamml/annotate/false } {}{ \alignedspace@left }
    \ams@start@box{#1}\bgroup
        \Let@ \chardef\dspbrk@context\@ne \restore@math@cr
        \spread@equation
        \ialign\bgroup
            \hfil\strut@$\m@th\displaystyle##
            \UseTaggingSocket{math/luamml/save/nNn}{ {} \displaystyle {mtd} }
            $
            \UseTaggingSocket{math/luamml/mtable/finalizecol}{last}
            \hfil
            \crcr
    \ams@return@opt@arg
}{%
  \endaligned
}
\def\endaligned
 {
      \crcr
      \UseExpandableTaggingSocket{math/luamml/mtable/innertable/save}
    \egroup
    \restorecolumn@
  \egroup
  \UseTaggingSocket{math/luamml/mtable/innertable/finalize}
 }
\renewenvironment{multline*}{\start@multline\st@rredtrue}
 {%
  \iftagsleft@ \@xp\lendmultline@ \else \@xp\rendmultline@ \fi
  \ignorespacesafterend
 }
\math_register_halign_env:nn {multline}{}
\math_register_halign_env:nn {multline*}{}
\def\multline@#1{%
    \Let@
    \@display@init{\global\advance\row@\@ne \global\dspbrk@lvl\m@ne}%
    \chardef\dspbrk@context\z@
    \restore@math@cr
    \let\tag\tag@in@align
    \global\tag@false \global\let\raise@tag\@empty
    \mmeasure@{#1}%
    \let\tag\gobble@tag \let\label\@gobble
    \tabskip \if@fleqn \@mathmargin \else \z@skip \fi
    \totwidth@\displaywidth
    \if@fleqn
        \advance\totwidth@-\@mathmargin
    \fi
    \halign\bgroup
        \hbox to\totwidth@{%
            \if@fleqn
                \hskip \@centering \relax
            \else
                \hfil
            \fi
            \strut@
            $\m@th\displaystyle{}##\endmultline@math
            \hfil
        }%
        \crcr
        \if@fleqn
            \hskip-\@mathmargin
            \def\multline@indent{\hskip\@mathmargin}% put it back
        \else
            \hfilneg
            \def\multline@indent{\hskip\multlinegap}%
        \fi
        \iftagsleft@
            \iftag@
                \begingroup
                    \ifshifttag@
                        \rlap{\vbox{%
                                \normalbaselines
                                \hbox{%
                                    \strut@
                                    \make@display@tag
                                }%
                                \vbox to\lineht@{}%
                                \raise@tag
                        }}%
                        \multline@indent
                    \else
                        \setbox\z@\hbox{\make@display@tag}%
                        \dimen@\@mathmargin \advance\dimen@-\wd\z@
                        \ifdim\dimen@<\multlinetaggap
                          \dimen@\multlinetaggap
                        \fi
                        \box\z@ \hskip\dimen@\relax
                    \fi
                \endgroup
            \else
                \multline@indent
            \fi
        \else
            \multline@indent
        \fi
    \ifmeasuring@ \else
      \UseTaggingSocket{math/luamml/mtable/aligncol} {left}
    \fi
    #1%
    \ifmeasuring@ \else
      \UseTaggingSocket{math/luamml/mtable/aligncol} {right}
    \fi
}
\def\endmultline@math
 {
   \UseTaggingSocket{math/luamml/save/nNn}{ {} \displaystyle {mtd} }
   $
   \UseTaggingSocket{math/luamml/mtable/finalizecol}{last}
 }
\def\rendmultline@{%
    \iftag@
      \UseTaggingSocket{math/luamml/save/nNn}{ {} \displaystyle {mtd} }
      $
      \UseTaggingSocket{math/luamml/mtable/finalizecol}{last}
        \let\endmultline@math\relax
            \ifshifttag@
                \hskip\multlinegap
                \llap{\vtop{%
                    \raise@tag
                    \normalbaselines
                    \setbox\@ne\null
                    \dp\@ne\lineht@
                    \box\@ne
                    \hbox{\strut@\make@display@tag}%
                }}%
            \else
                \hskip\multlinetaggap
                \make@display@tag
            \fi
    \UseTaggingSocket{math/luamml/mtable/tag/set}
    \else
        \hskip\multlinegap
    \fi
    \hfilneg
        \math@cr
       \UseExpandableTaggingSocket {math/luamml/mtable/finalize} {multline}
  \egroup
  \dollardollar@end
}
\def\lendmultline@{%
        \hfilneg
        \hskip\multlinegap
        \math@cr
        \UseExpandableTaggingSocket {math/luamml/mtable/finalize} {multline}
    \egroup
    \dollardollar@end
}
\def\env@cases{%
  \let\@ifnextchar\new@ifnextchar
  \left\lbrace
  \def\arraystretch{1.2}%
  \array{@{}l@{\quad}l@{\luamml_ignore:}}%
}

\renewenvironment {smallmatrix} {
  \UseTaggingSocket{ math/luamml/annotate/false } {} { \null\, }
  \vcenter \bgroup
    \Let@
    \restore@math@cr
    \default@tag
    \baselineskip 6 \ex@
    \lineskip 1.5 \ex@
    \lineskiplimit \lineskip
    \ialign \bgroup
        \hfil
        $
        \m@th
        \scriptstyle
        ##
        % No \scriptsize here since we want to add the mstyle nodes
        \UseTaggingSocket{math/luamml/save/nn}{ {} {mtd} }
        $
        \UseTaggingSocket{math/luamml/mtable/finalizecol}{last}
        \hfil
      &&
        \thickspace
        \hfil
        $
        \m@th
        \scriptstyle
        ##
        % No \scriptsize here since we want to add the mstyle nodes
        \UseTaggingSocket{math/luamml/save/nn}{ {} {mtd} }
        $
        \UseTaggingSocket{math/luamml/mtable/finalizecol}{last}
        \hfil
      \crcr
}{%
      \crcr
      \UseExpandableTaggingSocket{math/luamml/mtable/smallmatrix/save}
    \egroup
  \egroup
  \UseTaggingSocket{math/luamml/mtable/innertable/finalize}
  \UseTaggingSocket{ math/luamml/annotate/false } {}{ \, }
}
\cs_new:Npn\__math_split_debug_typeout:n#1{\use_none:n{#1}}
\bool_new:N\l__math_gathersplit_bool
\renewenvironment{split}{%
  \__math_split_debug_typeout:n {begin~split}
  \if@display
    \ifinner
       \@xp\@xp\@xp\split@aligned
    \else
      \ifst@rred \else \global\@eqnswtrue \fi
    \fi
  \else
    \let\endsplit\@empty \@xp\collect@body\@xp\split@err
  \fi
  \collect@body\gather@split
}{\__math_split_debug_typeout:n{end~split}%
     \crcr
    \UseExpandableTaggingSocket{math/luamml/mtable/innertable/save}%
    \egroup
  \egroup
  \iftagsleft@ \@xp\lendsplit@ \else \@xp\rendsplit@ \fi
}
\def\gather@split#1#2#3{
  \__math_split_debug_typeout:n{gather@split}%
  \@xp\endgroup \reset@equation % math@cr will handle equation numbering
  \iftag@
     \toks@\@xp{\df@tag}%
     \edef\split@tag{%
       \gdef\@nx\df@tag{\the\toks@}%
       \global\@nx\tag@true \@nx\nonumber
     }%
  \else \let\split@tag\@empty
  \fi
  \bool_set_true:N\l__math_gathersplit_bool
  \spread@equation
  \vcenter\bgroup
    \gather@{\split@tag
    \begin{split}#1\end{split}}%
    \def\endmathdisplay@a{%
      \__math_split_debug_typeout:n{endmathdisplay@a}
      \__math_split_debug_typeout:n{finalize~innertable~endmathdisplay@a}
      \math@cr
      \black@ \totwidth@
      \egroup
      \egroup
      \UseExpandableTaggingSocket{math/luamml/mtable/innertable/finalize}%
    }%
}
\def\insplit@{\__math_split_debug_typeout:n{insplit@}%
  \global\setbox\z@\vbox\bgroup
    \Let@ \chardef\dspbrk@context\@ne \restore@math@cr
    \default@tag % disallow use of \tag here
    \ialign\bgroup
      \hfil
      \strut@
      $\m@th\displaystyle {##}%
      \UseTaggingSocket{math/luamml/save/nNn}{ {} \displaystyle {mtd} }%
      $%
      \UseTaggingSocket{math/luamml/mtable/finalizecol}{last}%
      &$\m@th\displaystyle {{}##}%
      \UseTaggingSocket{math/luamml/save/nNn}{ {} \displaystyle {mtd} }%
      $%
      \UseTaggingSocket{math/luamml/mtable/finalizecol}{last}%
      \hfill % Why not \hfil?---dmj, 1994/12/28
      \crcr
}
\def\lendsplit@{%
    \global\setbox9\vtop{\unvcopy\z@}%
    \ifinalign@
        \setbox\@ne\vbox{%
            \unvcopy\z@
            \global\setbox8\lastbox
        }%
        \setbox\@ne\hbox{%
            \unhcopy8%
            \unskip
            \setbox\tw@\lastbox
            \unskip
            \global\setbox\thr@@\lastbox
        }%
        \__math_split_debug_typeout:n{lendsplit@/aligncase}
        \ifctagsplit@
         \__math_split_debug_typeout:n{lendsplit@/aligncase/centertags}
            \gdef\split@{%
                \hbox to\wd\thr@@{}%
               &\vcenter{\vbox{\moveleft\wd\thr@@\box9}}%
               \__math_split_debug_typeout:n{finalize~innertable~aligncase}
               \UseTaggingSocket{math/luamml/mtable/innertable/finalize}%
            }%
        \else
        %TODO, not correct yet.
         \__math_split_debug_typeout:n{lendsplit@/aligncase/tbtags}
            \gdef\split@{%
                \hbox to\wd\thr@@{}%
               &\vbox{\moveleft\wd\thr@@\box9}%
               \__math_split_debug_typeout:n{finalize~innertable~aligncase}
               \UseTaggingSocket{math/luamml/mtable/innertable/finalize}%
            }%
        \fi
    \else
        \ifctagsplit@
           \bool_if:NTF \l__math_gathersplit_bool
            {
              \__math_split_debug_typeout:n{lendsplit/equationcase/centertags}
              \gdef\split@%
               {\UseTaggingSocket{math/luamml/annotate/false}{}{\vcenter{\box9}}}
            }
            {
              \__math_split_debug_typeout:n {lendsplit/gathercase/centertags}
              \gdef\split@{\vcenter{\box9}%
              \__math_split_debug_typeout:n {finalize~innertable~gathercase}
              \UseTaggingSocket{math/luamml/mtable/innertable/finalize}}
            }
        \else
          % TODO tbtags not correct yet.
           \bool_if:NTF \l__math_gathersplit_bool
            {
              \__math_split_debug_typeout:n {lendsplit/equationcase/tbtags}
              \gdef\split@%
               {\UseTaggingSocket{math/luamml/annotate/false}{}{\box9}}
            }
            {
              \__math_split_debug_typeout:n {lendsplit/gathercase/tbtags}
              \gdef\split@{
                \box9%
                \__math_split_debug_typeout:n {finalize~innertable~gathercase}
                \UseTaggingSocket{math/luamml/mtable/innertable/finalize}}
            }
        \fi
    \fi
    \aftergroup\split@
}
\def\rendsplit@{%
    \ifinalign@
        \global\setbox9 \vtop{%
            \unvcopy\z@
            \global\setbox8 \lastbox
            \unskip
        }%
        \setbox\@ne\hbox{%
            \unhcopy8
            \unskip
            \global\setbox\tw@\lastbox
            \unskip
            \global\setbox\thr@@\lastbox
        }%
        \ifctagsplit@
            \gdef\split@{%
                \hbox to\wd\thr@@{}
                &\vcenter{\vbox{\moveleft\wd\thr@@\boxz@}}%
            \__math_split_debug_typeout:n {rendsplit/aligncase/centertags}
            \__math_split_debug_typeout:n {finalize~innertable~aligncase}
            \UseTaggingSocket{math/luamml/mtable/innertable/finalize}
            }%
        \else
           \__math_split_debug_typeout:n{rendsplit@/aligncase/tbtags}
           %TODO tbtags is not correct yet
            \global\setbox7 \hbox{\unhbox\tw@\unskip}%
            \gdef\split@{%
                \global\@tempcnta\column@
               &\setboxz@h{}%
                \savetaglength@
                \global\advance\row@\@ne
                \vbox{\moveleft\wd\thr@@\box9}%
               \crcr
                \noalign{\global\lineht@\z@}%
                \add@amps\@tempcnta
                \UseTaggingSocket{math/luamml/annotate/false}{}{\box\thr@@}
               &\box7
                 \__math_split_debug_typeout:n {finalize~innertable~aligncase}
                 \UseTaggingSocket{math/luamml/mtable/innertable/finalize}%
            }%
        \fi
    \else
        \ifctagsplit@
          \bool_if:NTF \l__math_gathersplit_bool
            {
              \__math_split_debug_typeout:n {rendsplit/equationcase/centertags}
              \gdef\split@%
               {\UseTaggingSocket{math/luamml/annotate/false}{}{\vcenter{\boxz@}}}
            }
            {
              \__math_split_debug_typeout:n  {rendsplit/gathercase/centertags}
              \gdef\split@{\vcenter{\boxz@}%
               \__math_split_debug_typeout:n {finalize~innertable~gathercase}
               \UseTaggingSocket{math/luamml/mtable/innertable/finalize}}
            }
        \else
           \bool_if:NTF \l__math_gathersplit_bool
            {
              \__math_split_debug_typeout:n {rendsplit/equationcase/tbtags}
              \gdef\split@{%
                \UseTaggingSocket{math/luamml/annotate/false}{}{\boxz@}}
            }
            {
              \__math_split_debug_typeout:n {rendsplit/gathercase/tbtags}
              \gdef\split@{%
                \boxz@
                \UseTaggingSocket{math/luamml/mtable/innertable/finalize}}
            }
        \fi
    \fi
    \aftergroup\split@
}
\def\intertext@{%
  \def\intertext##1{%
    \ifvmode\else\\\@empty\fi
    \noalign{%
      \penalty\postdisplaypenalty\vskip\belowdisplayskip
      \vbox{
       \ifmeasuring@\tag_suspend:n{\measuring}\fi
       \normalbaselines
        \ifdim\linewidth=\columnwidth
        \else \parshape\@ne \@totalleftmargin \linewidth
        \fi
        \tag_mc_end_push:
        \tagpdfsetup{para/tag=P}%
        \tagpdfparaOn
        \noindent\ignorespaces##1\par
        \tag_mc_begin_pop:n{}}%
      \penalty\predisplaypenalty\vskip\abovedisplayskip%
    }%
}}
\AddToHook{package/amstext/after}
 {
   \tag_if_active:T
    {
      \sys_if_engine_luatex:TF
       {
         \def\text@#1{
          \tag_socket_use:nnn {math/luamml/hbox}{}
          {{%
           \ifcase\mathstyle
           \hbox{{#1}}\or
           \hbox{{#1}}\or
           \hbox{{#1}}\or
           \hbox{{#1}}\or
           \hbox{{\let\f@size\sf@size\selectfont#1}}\or
           \hbox{{\let\f@size\sf@size\selectfont#1}}\or
           \hbox{{\let\f@size\ssf@size\selectfont#1}}\or
           \hbox{{\let\f@size\ssf@size\selectfont#1}}\or
           \ERROR
           \fi
           \check@mathfonts
         }}}
       }
       {
         \def\text@#1
          {{
           \int_gincr:N\g__math_mathchoice_int
           \tag_suspend:n{\text@}
           \mathchoice
            {
             \__math_tag_if_mathstyle:en{mathchoice-\int_use:N\g__math_mathchoice_int}{0}
             \textdef@\displaystyle\f@size{#1}
            }
            {
             \__math_tag_if_mathstyle:en{mathchoice-\int_use:N\g__math_mathchoice_int}{2}
             \textdef@\textstyle\f@size{\firstchoice@false #1}
            }
            {
             \__math_tag_if_mathstyle:en{mathchoice-\int_use:N\g__math_mathchoice_int}{4}
             \textdef@\textstyle\sf@size{\firstchoice@false #1}
            }
            {
              \__math_tag_if_mathstyle:en{mathchoice-\int_use:N\g__math_mathchoice_int}{6}
              \textdef@\textstyle \ssf@size{\firstchoice@false #1}
            }
            \check@mathfonts
          }}
       }
    }
 }
\AddToHook{package/amsbsy/after}
 {
   \def\pmb@@#1#2#3{\leavevmode\hbox_set:Nn\l__math_tmpa_box{xxx#3}
      \dimen@-\box_wd:N\l__math_tmpa_box
      \kern-.5\ex@\box_use:N\l__math_tmpa_box
      \tag_mc_end:\tag_mc_begin:n{artifact}
      \tag_mc_reset_box:N\l__math_tmpa_box
      \kern\dimen@\kern.25\ex@\raise.4\ex@\box_use:N\l__math_tmpa_box
      \kern\dimen@\kern.25\ex@\box_use_drop:N\l__math_tmpa_box
      \tag_mc_end:\tag_mc_begin:n{}
    }
   \def\pmb@#1#2{\hbox_set:Nn\l__math_tmpa_box{$\m@th#1{#2}$}
     \setboxz@h{$\m@th#1\mkern.5mu$}\pmbraise@\wdz@
     \binrel@{#2}
     \dimen@-\box_wd:N\l__math_tmpa_box
     \binrel@@{
       \mkern-.8mu\box_use:N\l__math_tmpa_box
       \tag_mc_end:\tag_mc_begin:n{artifact}
       \tag_mc_reset_box:N\l__math_tmpa_box
       \kern\dimen@\mkern.4mu\raise\pmbraise@\box_use:N\l__math_tmpa_box
       \kern\dimen@\mkern.4mu\box_use_drop:N\l__math_tmpa_box
       \tag_mc_end:\tag_mc_begin:n{}
       }
    }
  }
\ExplSyntaxOff
\endinput
%%
%% End of file `latex-lab-amsmath.ltx'.
