Pow x0 sec Add Pow 2 x0 exp Mul x6 x2 
Mul Pow x0 Add sec Add Pow 2 x0 exp Mul x6 x2 -1 Add sec Add Pow 2 x0 exp Mul x6 x2 Mul Mul x0 log x0 Mul Mul tan Add Pow 2 x0 exp Mul x6 x2 sec Add Pow 2 x0 exp Mul x6 x2 Mul Pow 2 Add x0 -1 2.69314718055995 