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