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