%% 
%%  Example 01-15-1 
%%  Copyright (C) 2017 Herbert Voss
%% 
%% ==== 
% Show page(s) 1
%% 
%% 
\documentclass[]{screxa}
\pagestyle{empty}
\setlength\textwidth{158.31393pt}
\usepackage[T1]{fontenc}
\usepackage{kpfonts}
%StartShownPreambleCommands

%StopShownPreambleCommands
\begin{document}
\begin{equation}
((x^2)^3)^4 = {({(x^2)}^3)}^4 =
         {\left({\left(x^2\right)}^3\right)}^4
\end{equation}
\end{document}
