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+%%
+%% An UIT Edition example
+%%
+%% Example 05-03-5 on page 75.
+%%
+%% 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}
+\setlength\parindent{0pt}
+\setcounter{equation}{2}
+\renewcommand\theequation{5.\arabic{equation}}
+\StartShownPreambleCommands
+\usepackage{xcolor,framed,amsmath,esint}
+\newcommand*\Q[2]{\frac{\partial #1}{\partial #2}}
+\definecolor{shadecolor}{cmyk}{0.2,0.1,0.9,0.1}
+\StopShownPreambleCommands
+\begin{document}
+\begin{shaded}
+\begin{align}
+\underset{\mathcal{G}\quad}\iiint\!%
+ \left[u\nabla^{2}v+\left(\nabla u,\nabla v\right)\right]\mathrm{d}^{3}V%
+ =\underset{\mathcal{S}\quad}\oiint u\Q{v}{n}\mathrm{d}^{2}A
+\end{align}
+\begin{align}
+\underset{{\mathcal{G}\quad}}\iiint\!%
+ \left[u\nabla^{2}v-v\nabla^{2}u\right]\mathrm{d}^{3}V%
+ =\underset{\mathcal{S}\quad}\oiint%
+ \left(u\Q{v}{n}-v\Q{u}{n}\right)\mathrm{d}^{2}A
+\end{align}
+\end{shaded}
+\end{document}