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