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%%  Example 01-22-4 
%%  Copyright (C) 2017 Herbert Voss
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\documentclass[]{screxa}
\pagestyle{empty}
\setlength\textwidth{182.31393pt}

%StartShownPreambleCommands

%StopShownPreambleCommands
\begin{document}
\section{The math function $f(x)=x^2$}
\begin{description}
\item[This is $y=f(x)$] Only a demonstration.
\item[And $z=f(x,y)$] Another demonstration.
\end{description}
\end{document}
