sech log Pow x0 sec cos Add 3 x4 
Mul Mul tanh log Pow x0 sec cos Add 3 x4 Mul -1 sech log Pow x0 sec cos Add 3 x4 Mul Mul Pow x0 Add sec cos Add 3 x4 -1 sec cos Add 3 x4 Pow Pow x0 sec cos Add 3 x4 -1 