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