/ 2\ x*asin\x /
2 2*x / 2\ ----------- + asin\x / ________ / 4 \/ 1 - x
/ 4 \ | 2*x | 2*x*|3 + ------| | 4| \ 1 - x / ---------------- ________ / 4 \/ 1 - x
/ 8 4 \ | 12*x 16*x | 2*|3 + --------- + ------| | 2 4| | / 4\ 1 - x | \ \1 - x / / -------------------------- ________ / 4 \/ 1 - x