/ _________\ asin\\/ 1 - 3*x /
asin(sqrt(1 - 3*x))
___ -\/ 3 ------------------- ___ _________ 2*\/ x *\/ 1 - 3*x
___ /1 3 \ \/ 3 *|- - -------| \x 1 - 3*x/ ------------------- ___ _________ 4*\/ x *\/ 1 - 3*x
___ / 1 9 2 \ 3*\/ 3 *|- -- - ---------- + -----------| | 2 2 x*(1 - 3*x)| \ x (1 - 3*x) / ----------------------------------------- ___ _________ 8*\/ x *\/ 1 - 3*x