<html><head><meta name="color-scheme" content="light dark"></head><body><pre style="word-wrap: break-word; white-space: pre-wrap;">%% 
%%  An UIT Edition example
%% 
%%  Example 09-16-6 on page 183.
%% 
%%  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}}
\StartShownPreambleCommands
\usepackage{gauss}  \renewcommand\rowmultlabel[1]{|\,\times#1}
\StopShownPreambleCommands
\begin{document}
\[\begin{gmatrix}
 1 &amp;-2 &amp; 1 &amp; 2 &amp; &amp; 8 \\  2 &amp; 3 &amp;-2 &amp; 3 &amp; &amp; 14\\ % rows 0 and 1
 4 &amp;-1 &amp; 3 &amp;-1 &amp; &amp; 7 \\  3 &amp; 2 &amp;-4 &amp; 5 &amp; &amp; 5 \\ % 2 and 3
                     \\
 1 &amp;-2 &amp; 1 &amp; 2 &amp; &amp; 8 \\  0 &amp; 7 &amp;-4 &amp;-1 &amp; &amp;-2 \\ % 5 and 6
 0 &amp; 7 &amp;-1 &amp;-9 &amp; &amp;-25\\  0 &amp; 8 &amp;-7 &amp;-1 &amp; &amp;-9 \\ % 7 and 8
                     \\
 1 &amp;-2 &amp; 1 &amp; 2 &amp; &amp; 8 \\  0 &amp; 7 &amp;-4 &amp;-1 &amp; &amp;-2 \\ % 10 and 11
 0 &amp; 0 &amp; 3 &amp;-8 &amp; &amp;-23\\  0 &amp; 0 &amp;-17&amp; 1 &amp; &amp;-47\\ % 12 and 13
                     \\
 1 &amp;-2 &amp; 1 &amp; 2 &amp; &amp; 8 \\  0 &amp; 7 &amp;-4 &amp;-1 &amp; &amp;-2 \\ % 15 and 16
 0 &amp; 0 &amp; 3 &amp;-8 &amp; &amp;-23\\  0 &amp; 0 &amp; 0 &amp;-\frac{133}{3}&amp; &amp;\frac{-532}{3} % 17 and 18
\rowops
\mult{0}{(-2)}\add{0}{1}\mult{0}{(-4)}\add{0}{2}\mult{0}{(-3)}\add{0}{3}% matrix 1
\mult{6}{(-1)}\add{6}{7}\mult{6}{(-\frac{8}{7})}\add{6}{8}% matrix 2
\mult{12}{\frac{17}{3}}\add{12}{13} % matrix 3
\end{gmatrix} \]
\end{document}
</pre></body></html>