%% 
%%  Example 01-04-5 
%%  Copyright (C) 2017 Herbert Voss
%% 
%% ==== 
% Show page(s) 1
%% 
%% 
\documentclass[]{screxa}
\pagestyle{empty}
\setlength\textwidth{158.31393pt}
\setlength\parindent{0pt}
%StartShownPreambleCommands
\newenvironment{Array}
  {\[\setlength{\arraycolsep}{1.4pt}
   \begin{array}{rcl}}
  {\end{array}\]}
%StopShownPreambleCommands
\begin{document}
\begin{Array}
f(x) & = & \int\frac{\sin x}{x}\,\mathrm{d}x
\end{Array}
\end{document}
