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