sec Add Pow x1 pi Pow Add x2 tanh x3 atan x0 
Mul Mul tan Add Pow x1 pi Pow Add x2 tanh x3 atan x0 sec Add Pow x1 pi Pow Add x2 tanh x3 atan x0 Mul Pow Add x2 tanh x3 Add atan x0 -1 Mul Mul Add x2 tanh x3 log Add x2 tanh x3 Pow Add 1 Mul x0 x0 -1 