In the maxima computer algebra system[1] which was ancestrally based on lisp it ...

In the maxima computer algebra system[1] which was ancestrally based on lisp it has a single quote operator[2] which delays evaluation of something and a "double quote" (which acually two single quotes rather than an actual double quote) operator[3] which asks maxima to evaluate some expression immediately rather than leaving it in symbolic form.[4]

[4] although (in my limited experience) maxima sometimes refuses to evaluate anyway even if you do the double quote thing