3 ms·Surely you mean (++ A)?by vadman 13y agoSurely you mean (++ A)?tsm 13y ago(1+ 'A)ohyes 13y agoSymbol A is not of type number. (1+ a)gsg 13y agoA++ is a grade, not a number. Clearly what you need is #S(grade :letter A :decorations (+ +) :rapidly-escalating-pedantry t) or some other meaningful representation.