2 x *acos(x)
2 x - ----------- + 2*x*acos(x) ________ / 2 \/ 1 - x
3 x 4*x 2*acos(x) - ----------- - ----------- 3/2 ________ / 2\ / 2 \1 - x / \/ 1 - x
/ 4 2 \ | 3*x 7*x | -|6 + --------- + ------| | 2 2| | / 2\ 1 - x | \ \1 - x / / -------------------------- ________ / 2 \/ 1 - x