acot(x) ------- - atan(6*x) 2
acot(x)/2 - atan(6*x)
6 1 - --------- - ---------- 2 / 2\ 1 + 36*x 2*\1 + x /
/ 1 432 \ x*|--------- + ------------| | 2 2| |/ 2\ / 2\ | \\1 + x / \1 + 36*x / /
2 2 1 432 62208*x 4*x --------- + ------------ - ------------ - --------- 2 2 3 3 / 2\ / 2\ / 2\ / 2\ \1 + x / \1 + 36*x / \1 + 36*x / \1 + x /