4 x *(7 - 6*acot(x))
x^4*(7 - 6*acot(x))
4 3 6*x 4*x *(7 - 6*acot(x)) + ------ 2 1 + x
/ 3 \ 2 | x 4*x | 12*x *|7 - 6*acot(x) - --------- + ------| | 2 2| | / 2\ 1 + x | \ \1 + x / /
/ / 2 \\ | 3 | 4*x || | x *|-1 + ------|| | 3 | 2|| | 12*x 18*x \ 1 + x /| 12*x*|14 - 12*acot(x) - --------- + ------ + ----------------| | 2 2 2 | | / 2\ 1 + x / 2\ | \ \1 + x / \1 + x / /