asin(4*x + 1)
4 ------------------- ________________ / 2 \/ 1 - (4*x + 1)
16*(1 + 4*x) ------------------- 3/2 / 2\ \1 - (1 + 4*x) /
/ 2 \ | 3*(1 + 4*x) | 64*|1 + --------------| | 2| \ 1 - (1 + 4*x) / ----------------------- 3/2 / 2\ \1 - (1 + 4*x) /