acos(x)*2*x + b*sin(2*x)
(acos(x)*2)*x + b*sin(2*x)
2*x acos(x)*2 - ----------- + 2*b*cos(2*x) ________ / 2 \/ 1 - x
/ 2 \ | 2 x | -2*|----------- + ----------- + 2*b*sin(2*x)| | ________ 3/2 | | / 2 / 2\ | \\/ 1 - x \1 - x / /
/ 3 \ | 3*x 4*x | -2*|----------- + 4*b*cos(2*x) + -----------| | 5/2 3/2| |/ 2\ / 2\ | \\1 - x / \1 - x / /