[texhax] Oblique cancellation with plain TeX

[David Carlisle]

On Fri, 4 Jan 2019 at 22:05, Rodolfo Medina <rodolfo.medina at gmail.com> wrote:
>
> David Carlisle <d.p.carlisle at gmail.com> writes:
>
> > \input picture
> > \catcode`\@=11
> >
> > \RequirePackage{cancel}
> > \let\zzcancel\cancel
> > \def\cancel#1{{%
> > \let\line\LaTeX at line
> > \zzcancel{#1}}}
> >
> > $\cancel{x^2 + 1}$
> >
> > $\cancel{a}$
> >
> > $\cancel{{x^2 + 1 \over b}}$
> >
> >
> > \bye
>
>
> Fantastic...!!

Of course simply using latex gives a better tested codepath than
loading a large chunk of latex circa 1993  but you seem to want to
avoid doing that for some reason.

David

>
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