_ _ _ _ _ _ _ _ _ _ _ _ _
U X e dUdX, e dX, cosine, secant, tangent, sine, 3.14159..
_ _ _ _ _ _ _ _ _ _ _ _ _
^__^ /
(oo)\_______/ _________
(__)\ )=( ____|_ \_____
||----w | \ \ \_____ |
|| || || ||
man -k palavra-chave