atan(x) ------- 3 x
atan(x)/x^3
1 3*atan(x) ----------- - --------- 3 / 2\ 4 x *\1 + x / x
/ 1 3 6*atan(x)\ 2*|- --------- - ----------- + ---------| | 2 2 / 2\ 3 | | / 2\ x *\1 + x / x | \ \1 + x / / ----------------------------------------- 2 x
/ 2 \ | 4*x | | -1 + ------ | | 2 | | 9 1 + x 30*atan(x) 18 | 2*|--------- + ----------- - ---------- + -----------| | 2 2 3 2 / 2\| |/ 2\ / 2\ x x *\1 + x /| \\1 + x / \1 + x / / ------------------------------------------------------ 3 x