3 x 2 ------ + 3*x *atan(x) 2 1 + x
/ 3 \ | x 3*x | 2*x*|3*atan(x) - --------- + ------| | 2 2| | / 2\ 1 + x | \ \1 + x / /
/ / 2 \\ | 3 | 4*x || | x *|-1 + ------|| | 3 | 2|| | 9*x 9*x \ 1 + x /| 2*|3*atan(x) - --------- + ------ + ----------------| | 2 2 2 | | / 2\ 1 + x / 2\ | \ \1 + x / \1 + x / /