Template:Square root A

{{subst:subst}}#ifexpr:({{{2}}}-{{{2}}}/2-{{{1}}}/{{{2}}}/2>{{{3}}}) or ({{{2}}}-{{{2}}}/2-{{{1}}}/{{{2}}}/2<-{{{3}}}) |{{subst:subst}}Square root A|{{{1}}}||{{{3}}}}}}}
{{{2}}}

Substituting this template produces one or more new substitution template calls, allowing recursive change of a page, see m:Help:Recursive conversion of wikitext.