%%
%% An UIT Edition example
%%
%% Example 08-01-6 on page 151.
%%
%% 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{338.01643pt}
\AtBeginDocument{\setlength\parindent{0pt}}
\StartShownPreambleCommands
\newcommand*\diff{\mathop{}\!\mathrm{d}}
\StopShownPreambleCommands
\begin{document}
\[ f(x) = \int\frac{\sin x}{x}\diff x\ \fbox{\the\displayindent} \]
\[\displayindent=50pt
f(x) = \int\frac{\sin x}{x}\diff x\ \fbox{\the\displayindent} \]
\[\displayindent=100pt
f(x) = \int\frac{\sin x}{x}\diff x\ \fbox{\the\displayindent}\]
\end{document}
