-2*acos(x) ----------- ________ / 2 \/ 1 - x
/ 1 x*acos(x) \ -2*|------- + -----------| | 2 3/2| |-1 + x / 2\ | \ \1 - x / /
/ 2 \ | acos(x) 3*x 3*x *acos(x)| 2*|- ----------- + ---------- - ------------| | 3/2 2 5/2 | | / 2\ / 2\ / 2\ | \ \1 - x / \-1 + x / \1 - x / /