Is there a /sci/ version of "tricks" something like this
https://math.stackexchange.com/questions/275547/bag-of-tricks-in-advanced-calculus-real-analysis-complex-analysis/873350#873350
https://math.stackexchange.com/questions/275547/bag-of-tricks-in-advanced-calculus-real-analysis-complex-analysis/873350#873350
