/1\ atan(x)*log|-| \x/
atan(x)*log(1/x)
/1\ log|-| \x/ atan(x) ------ - ------- 2 x 1 + x
/1\ 2*x*log|-| atan(x) 2 \x/ ------- - ---------- - ---------- 2 / 2\ 2 x x*\1 + x / / 2\ \1 + x /
/ 2 \ | 4*x | /1\ 2*|-1 + ------|*log|-| | 2| \x/ 6 2*atan(x) 3 \ 1 + x / --------- - --------- + ----------- + ---------------------- 2 3 2 / 2\ 2 / 2\ x x *\1 + x / / 2\ \1 + x / \1 + x /