3 x *acot(x)
3 x 2 - ------ + 3*x *acot(x) 2 1 + x
/ 3 \ | x 3*x | 2*x*|3*acot(x) + --------- - ------| | 2 2| | / 2\ 1 + x | \ \1 + x / /
/ 5 3 \ | 9*x 4*x 10*x | 2*|3*acot(x) - ------ - --------- + ---------| | 2 3 2| | 1 + x / 2\ / 2\ | \ \1 + x / \1 + x / /