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%D \module
%D [ file=math-com,
%D version=2022.07.17,
%D title=\CONTEXT\ Math Macros,
%D subtitle=Combinations,
%D author=Hans Hagen,
%D date=\currentdate,
%D copyright={PRAGMA ADE \& \CONTEXT\ Development Team}]
%C
%C This module is part of the \CONTEXT\ macro||package and is
%C therefore copyrighted by \PRAGMA. See mreadme.pdf for
%C details.
\writestatus{loading}{ConTeXt Math Macros / Initializations}
%D This module might be extended.
\unprotect
% \startcombination[2*2]
% \startcontent
% \startplaceformula\startformula[width=\combinationwidth,title=a]1+x\stopformula\stopplaceformula
% \stopcontent
% \startcaption\stopcaption
% \startcontent
% \startplaceformula\startformula[width=\combinationwidth,title=b]2+x\stopformula\stopplaceformula
% \stopcontent
% \startcaption\stopcaption
% \startcontent
% \startplaceformula\startformula[width=\combinationwidth,xxxxx=c]3+x\stopformula\stopplaceformula
% \stopcontent
% \startcaption\stopcaption
% \startcontent
% \startplaceformula\startformula[width=\combinationwidth,title=d]4+x\stopformula\stopplaceformula
% \stopcontent
% \startcaption\stopcaption
% \stopcombination
%
% \startplaceformula[a]
% \startcombination[formula][nx=2,ny=2]
% \startformula[width=\combinationwidth,title=a]1+x\stopformula
% \startformula[width=\combinationwidth,title=b]2+x\stopformula
% \startformula[width=\combinationwidth,xxxxx=c]3+x\stopformula
% \startformula[width=\combinationwidth,title=d]4+x\stopformula
% \stopcombination
% \stopplaceformula
%
% \startplaceformula[a]
% \startformulacombination[nx=2,ny=2]
% \startformula[width=\combinationwidth,title=a]1+x\stopformula
% \startformula[width=\combinationwidth,title=b]2+x\stopformula
% \startformula[width=\combinationwidth,xxxxx=c]3+x\stopformula
% \startformula[width=\combinationwidth,title=d]4+x\stopformula
% \stopformulacombination
% \stopplaceformula
\defcsname\??combinationmethod\v!formula\endcsname
{\vcenter}
\defcsname\??combinationmethod\v!formula:\v!start\endcsname
{\startformula
\dostarttagged\t!formulaset\empty
\global\settrue\c_strc_formulas_inside_formulas
\bgroup
\setupformulas[\c!width=\combinationwidth]%
\enforced\tolerant\protected\def\startformula[##1]%
{\startcontent
\strc_formulas_nested_formula_start[\c!width=\combinationwidth,##1]}%
\enforced\protected\def\stopformula
{\normalexpanded
{\strc_formulas_nested_formula_stop
\stopcontent
\startcaption
\formulaparameter\c!title
\stopcaption}}}
\defcsname\??combinationmethod\v!formula:\v!stop\endcsname
{\egroup
\global\setfalse\c_strc_formulas_inside_formulas
\dostoptagged
\stopformula
\the\everyresetformulas}
\definecombination[\v!formula][method=formula,width=\hsize]
\protected\def\startformulacombination{\startcombination[\v!formula]}
\protected\def\stopformulacombination {\stopcombination}
\protect
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