2 4*x - log(x) + x*atanh(x)
4*x^2 - log(x) + x*atanh(x)
1 x - - + 8*x + ------ + atanh(x) x 2 1 - x
2 1 2 2*x 8 + -- - ------- + ---------- 2 2 2 x -1 + x / 2\ \-1 + x /
/ 3 \ | 1 4*x 4*x | 2*|- -- - ---------- + ----------| | 3 3 2| | x / 2\ / 2\ | \ \-1 + x / \-1 + x / /