acot(x) ------- x
1 acot(x) - ---------- - ------- / 2\ 2 x*\1 + x / x
/ 1 acot(x) 1 \ 2*|--------- + ------- + -----------| | 2 3 2 / 2\| |/ 2\ x x *\1 + x /| \\1 + x / /
/ 2 3*acot(x) 3 4*x \ -2*|----------- + --------- + ----------- + ---------| | 2 4 3 / 2\ 3| | / 2\ x x *\1 + x / / 2\ | \x*\1 + x / \1 + x / /