%%
%% An UIT Edition example
%%
%% Example 06-03-17 on page 95.
%%
%% 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[]{exaarticle}
\pagestyle{empty}
\setlength\textwidth{375.57637pt}
\AtBeginDocument{\setlength\parindent{0pt}}
\setcounter{equation}{42}
\renewcommand\theequation{6.\arabic{equation}}
\StartShownPreambleCommands
\usepackage{amsmath}
\StopShownPreambleCommands
\begin{document}
\begin{align}
x &= \begin{cases}
0 & \text{if } a=\ldots\\
1 & \text{if } b=\ldots\\
x & \parbox{5cm}{\raggedright This text may be as long as it wants to be,
but sometimes there are problems\ldots\ not anymore :)}
\end{cases}
\end{align}
\end{document}
