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+%%
+%% An UIT Edition example
+%%
+%% Example 09-08-1 on page 173.
+%%
+%% 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{153.70511pt}
+\AtBeginDocument{\setlength\parindent{0pt}}
+\StartShownPreambleCommands
+\usepackage{amsmath,color,cancel}
+\newcommand\hcancel[2][black]{%
+ \setbox0=\hbox{#2}%
+ \rlap{\raisebox{.45\ht0}{%
+ \textcolor{#1}{\rule{\wd0}{1pt}}}}#2}
+\StopShownPreambleCommands
+\begin{document}
+$\cancel{3}\qquad
+ f(x)=\dfrac{\left(x^2+1\right)
+ \cancel{(x-1)}}{\cancel{(x-1)}(x+1)}$\\[0.5cm]
+$\bcancel{3}\qquad\bcancel{1234567}$\\[0.5cm]
+\renewcommand*{\CancelColor}{\color{cyan}}
+$\xcancel{3}\qquad\xcancel{1234567}$\\[0.5cm]
+$\hcancel{3}\qquad\hcancel[red]{1234567}$
+\end{document}