2 acos (x) ----------- ________ / 2 \/ 1 - x
/ 2 x*acos(x) \ |------- + -----------|*acos(x) | 2 3/2| |-1 + x / 2\ | \ \1 - x / /
2 2 2
2 acos (x) 6*x*acos(x) 3*x *acos (x)
----------- + ----------- - ----------- + -------------
3/2 3/2 2 5/2
/ 2\ / 2\ / 2\ / 2\
\1 - x / \1 - x / \-1 + x / \1 - x /