[texhax] Oblique cancellation with plain TeX

[Rodolfo Medina]

Philip Taylor <P.Taylor at Rhul.Ac.Uk> writes:

> Maybe if you were to post a GIF/PNG/JPG/PDF of the effect you are trying to
> create, we non-mathematicians might be better placed to help you ...


The following is a simple example: to be processed with simply `latex file'.  I
want the same but with plain TeX...  Thanks,

Rodolfo

\documentclass[preview,border=12pt,varwidth]{standalone}
\usepackage{cancel}
\begin{document}
\abovedisplayskip=0pt
\[
\frac{a\cancel{b}}{\cancel{b}}=a
\]
\end{document}