Online Algebra Calculator
Many of users do not use powerful Maxima computer algebra system for systematic work, but for ad hoc algebraic calculations – equations, functions, matrixes, etc. only. To do this job, it is not useful to download the whole application from a web site.
-- Option variable: lispdisp Default value: false
When lispdisp is true, Lisp symbols are displayed with a leading question mark ?. Otherwise, Lisp symbols are displayed with no leading mark.

Examples:
(%i1) lispdisp: false$
(%i2) ?foo + ?bar;
(%o2) foo + bar
(%i3) lispdisp: true$
(%i4) ?foo + ?bar;
(%o4) ?foo + ?bar(%o1) true (%i2)