%% 
%%  Example 04-01-10 
%%  Copyright (C) 2016 Herbert Voss
%% 
%% ==== 
% Show page(s) 1
%% 
%% 
\documentclass[]{screxa}
\pagestyle{empty}
\setlength\textwidth{328.62788pt}
\setlength\parindent{0pt}
%StartShownPreambleCommands
\usepackage{amsmath,cancel,xcolor}
\newcommand\hcancel[2][black]{\setbox0=\hbox{#2}%
  \rlap{\raisebox{.45\ht0}{\textcolor{#1}{\rule{\wd0}{1pt}}}}#2}
%StopShownPreambleCommands
\begin{document}
$f(x)=\dfrac{\left(x^2+1\right)\cancel{(x-1)}}{\cancel{(x-1)}(x+1)}$\\[0.5cm]
$\bcancel{3}\qquad\bcancel{1234567}$ \qquad   $\xcancel{3}\qquad\xcancel{1234567}$
$\hcancel{3}\qquad\hcancel[red]{1234567}$
\end{document}
