Mul Pow acoth log Add -2 x0 x0 acoth sec Pow E Add -1 x1 
Mul acoth sec Pow E Add -1 x1 Mul Pow acoth log Add -2 x0 Add x0 -1 Add Mul x0 Mul Pow Add -2 x0 -1 Pow Add 1 Mul -1 Mul log Add -2 x0 log Add -2 x0 -1 Mul acoth log Add -2 x0 log acoth log Add -2 x0 