/ x\ \x + E /*acot(x)
(x + E^x)*acot(x)
x / x\ x + E \1 + E /*acot(x) - ------ 2 1 + x
/ x\ / x\ x 2*\1 + e / 2*x*\x + e / acot(x)*e - ---------- + ------------ 2 2 1 + x / 2\ \1 + x /
/ 2 \ | 4*x | / x\ 2*|-1 + ------|*\x + e / x | 2| / x\ x 3*e \ 1 + x / 6*x*\1 + e / acot(x)*e - ------ - ------------------------ + ------------ 2 2 2 1 + x / 2\ / 2\ \1 + x / \1 + x /