Actually the integral is pretty easy and would be calc 1. Most books don't get into sums until calc 2 though. e^ipi is just an identity you probably don't need until calc2/3 or Diff Eq, depending.
e^iPi isn't even a problem, its just something used to transform between various things. Its just -1, after all.
(that totally freaked me out when I first discovered that. Who would expect that taking e and raising it to i times Pi would be NEGATIVE ONE of all the damn things?!)
GO TO grade schoolThe hell is this...Whaaaa...Even idiocy has limits.SERIOUSLY, DIE!This is way too stupidGarbageSo stupid it's amazingShe just added them lololol There's a pink arrow behind her back pointing to 9x7How do you even go shopping??What is e?