Mul Pow atan Mul x0 sec x4 -0.653643620863612 x0 
Add Mul x0 Mul Pow atan Mul x0 sec x4 -1.65364362086361 Mul -0.653643620863612 Mul sec x4 Pow Add 1 Mul Mul x0 sec x4 Mul x0 sec x4 -1 Pow atan Mul x0 sec x4 -0.653643620863612 