Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Beautiful inflight to the real math

Mr. Berlinski book has made me see, through a powerful pedagogical lens, that most mathematics books, Calculus in particular, are a distilled and purified product of a brew made from the blood, sweat and tears of many mathematicians across the centuries. The next time I pick up a textbook and read "it easily follows" or " it is clearly evident", I'll know for sure that those words are, at least, presumptuous.