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