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+%% 
+%%  An UIT Edition example
+%% 
+%%  Example 04-01-4 on page 33.
+%% 
+%%  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}}
+\setcounter{equation}{2}
+\renewcommand\theequation{4.\arabic{equation}}
+\StartShownPreambleCommands
+\setlength\arraycolsep{1.4pt}
+\StopShownPreambleCommands
+\begin{document}
+\begin{equation}
+\left.
+\begin{array}{r@{\hspace{.75em}}ccrr}
+  \textrm{a}) & y & = & d              & \textrm{(constant)}   \\[1pt]
+  \textrm{b}) & y & = & cx+d           & \textrm{(linear)}     \\
+  \textrm{c}) & y & = & bx^2+cx+d      & \textrm{(quadratic)}\\
+  \textrm{d}) & y & = & ax^3+bx^2+cx+d & \textrm{(cubic)}
+\end{array}
+\right\} \textrm{polynomials}
+\end{equation}
+\end{document}