%%
%% An UIT Edition example
%%
%% Example 04-01-1 on page 32.
%%
%% 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}
\AtBeginDocument{\setlength\parindent{0pt}}
\setcounter{equation}{0}
\renewcommand\theequation{4.\arabic{equation}}
\StartShownPreambleCommands
\StopShownPreambleCommands
\begin{document}
\begin{equation}
\begin{array}{@{} rcl @{}}
\mathrm{right} & \mathrm{centre}
& \mathrm{left} \\[10pt]
a & b & c \\\hline
1 & 2 & 3 \\\cline{2-3}
A & \multicolumn{2}{|c|}{B C} \\\cline{2-3}
\end{array}
\end{equation}
\end{document}
