%% An UIT Edition example

%%
%% An UIT Edition example
%%
%% Example 04-20-3 on page 69.
%%
%% 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}}
\StartShownPreambleCommands

\StopShownPreambleCommands
\begin{document}
$f(x)=\underline{x^2-1}$
\[ F(x)=\int \underline{f(x)\,\mathrm{d}x} \]
\[ \underline{F(x)=\int f(x)\,\mathrm{d}x} \]
\end{document}