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%%
%% An UIT Edition example
%%
%% Example 04-11-2 on page 60.
%%
%% 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{153.70511pt}
\AtBeginDocument{\setlength\parindent{0pt}}
\StartShownPreambleCommands
\StopShownPreambleCommands
\begin{document}
$\begin{array}{r@{\kern1.5pt}c@{\kern1.5pt}c}
& & \textrm{factorise}\\
f(x) & = & \underbrace{\overbrace{x^{2}+2x+1}}\\
& & \quad\left(x+1\right)^{2}
\end{array}$
\end{document}
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