Mul -2 Mul atanh acot Mul 0.500000000000000 x0 -2 
Mul -2 Mul -2 Mul Mul -1 Mul 0.500000000000000 Pow Add 1 Mul Mul 0.500000000000000 x0 Mul 0.500000000000000 x0 -1 Pow Add 1 Mul -1 Mul acot Mul 0.500000000000000 x0 acot Mul 0.500000000000000 x0 -1 