cot Mul Add Mul Mul atan x1 Add 1 x5 x0 Add x0 Mul atan x4 4 x0 
Mul Mul -1 Pow csc Mul Add Mul Mul atan x1 Add 1 x5 x0 Add x0 Mul atan x4 4 x0 2 Add Mul x0 Add Mul atan x1 Add 1 x5 1 Add Mul Mul atan x1 Add 1 x5 x0 Add x0 Mul atan x4 4 