Mul sech Pow sec x0 -0.267452747467949 -1.37340076694502 
Mul -1.37340076694502 Mul Mul tanh Pow sec x0 -0.267452747467949 Mul -1 sech Pow sec x0 -0.267452747467949 Mul Pow sec x0 -1.26745274746795 Mul -0.267452747467949 Mul tan x0 sec x0 