4 3*x + 2*cos(x) - 3*acot(x) + 2 - 8
3*x^4 + 2*cos(x) - 3*acot(x) + 2 - 8
3 3 -2*sin(x) + ------ + 12*x 2 1 + x
/ 2 3*x \ 2*|-cos(x) + 18*x - ---------| | 2| | / 2\ | \ \1 + x / /
/ 2 \ | 3 12*x | 2*|- --------- + 36*x + --------- + sin(x)| | 2 3 | | / 2\ / 2\ | \ \1 + x / \1 + x / /