@futurebird Of the few I understood, 43 comes closest to an ambiguity that annoys me. What does sin²x mean?
I've seen it used for both. If it's the first answer to 43 then it must also be my first answer below, mustn't it?
My sister (independently) asked one of her mathematical physics lecturers about it and he said it was obvious from the context. Super!
Also, what does x/y/z mean? (x/y)/z or x/(y/z)? One of my computer science lecturers said it was formally undefined (by a vote at some mathematical congress or something) but I've not been able to find a reference.
futurebird