FriCAS
(1) -> 1 + 1
Maxima
maxima(%i2) 1+1
maxima<latex> \mbox{\tt\red(\mathrm{\%o2}) \black} \mbox{{}/var/lib/zope2.10/instance/axiom-wiki/var/LatexWiki/1815619897837861060-25px.001.max{}} </latex>
Reduce
1 + 1;