User:Duneatreides/Sandbox

User:Duneatreides/Sandbox

$$ e^x = \sum_{k=0}^\infty \frac {x^k}{k!} $$

$$ \sin x = \sum_{k=0}^\infty \frac {(-1)^k x^{2k+1}}{(2k+1)!} $$

$$ e = \sum_{k=0}^\infty \frac {1}{k!} = \frac {1}{0!} + \frac {1}{1!} + \frac {1}{2!} + \frac {1}{3!}$$