%% 
%%  An UIT Edition example
%% 
%%  Example 02-02-4 on page 7.
%% 
%%  Copyright (C) 2010 Herbert Voss
%% 
%%  It may be distributed and/or modified under the conditions
%%  of the LaTeX Project Public License, either version 1.3
%%  of this license or (at your option) any later version.
%% 
%%  See http://www.latex-project.org/lppl.txt for details.
%% 
%% 
%% ==== 
% Show page(s) 1
%% 
\documentclass[]{examinimal}
\pagestyle{empty}
\setlength\textwidth{375.57637pt}
\setlength\parindent{0pt}
\usepackage[utf8]{inputenc}
\renewcommand\thesubsection{2.2.3}% nur Demo
\let\section\subsection% nur Demo
\StartShownPreambleCommands
\providecommand*\nxLcs[1]{\texttt{\textbackslash#1}}
\StopShownPreambleCommands
\begin{document}
\section[Math expressions in headings]% short form for the toc
  {Math expressions in \nxLcs{part},
  \nxLcs{chapter}, \nxLcs{section} etc.\ headings,
e.g.\ $f(x)=\prod_{i=1}^{n}\left(i-\frac{1}{2i}\right)$}
normal text\ldots
\end{document}