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