%%
%% Ein Beispiel der DANTE-Edition
%% Mathematiksatz mit LaTeX
%% 3. Auflage
%% Beispiel 09-10-1 auf Seite 181.
%% Copyright (C) 2018 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[10pt]{screxa}
\pagestyle{empty}
\setlength\textwidth{122.40707pt}
\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}
