/ 3 \ 2 | x 4*x | 2*x *|6*acot(x) + --------- - ------| | 2 2| | / 2\ 1 + x | \ \1 + x / /
/ / 2 \\ | 3 | 4*x || | x *|-1 + ------|| | 3 | 2|| | 18*x 12*x \ 1 + x /| 2*x*|12*acot(x) - ------ + --------- - ----------------| | 2 2 2 | | 1 + x / 2\ / 2\ | \ \1 + x / \1 + x / /