acot(x) E
E^acot(x)
acot(x) -e ---------- 2 1 + x
acot(x) (1 + 2*x)*e ------------------ 2 / 2\ \1 + x /
/ 2 \ | 1 8*x 6*x | acot(x) |2 - ------ - ------ - ------|*e | 2 2 2| \ 1 + x 1 + x 1 + x / --------------------------------------- 2 / 2\ \1 + x /