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+%%
+%% An UIT Edition example
+%%
+%% Example 03-05-1 on page 25.
+%%
+%% 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{201.70511pt}
+\setlength\parindent{0pt}
+\usepackage[english]{babel}
+\setcounter{equation}{22}
+\renewcommand\theequation{3.\arabic{equation}}
+\StartShownPreambleCommands
+
+\StopShownPreambleCommands
+\begin{document}
+\begin{eqnarray}
+y & = & d \label{eq:2}\\
+y & = & cx+d\\
+y & = & bx^{2}+cx+d\\
+y & = & ax^{3}+bx^{2}+cx+d\label{eq:5}
+\end{eqnarray}
+In the coding we gave equations~\ref{eq:2}
+and~\ref{eq:5} a label so that they could
+be referred to in the text.
+\end{document}