Pow asec sec x0 Add x0 Add x0 1 
Mul Pow asec sec x0 Add Add x0 Add x0 1 -1 Add Mul Add x0 Add x0 1 Mul Mul tan x0 sec x0 Pow Mul Mul sqrt Add 1 Mul -1 Pow Mul sec x0 sec x0 -1 sec x0 sec x0 -1 Mul Mul asec sec x0 log asec sec x0 2 