sech Add -0.999998600209970 csc asec x0 
Mul Mul tanh Add -0.999998600209970 csc asec x0 Mul -1 sech Add -0.999998600209970 csc asec x0 Mul Mul Mul -1 cot asec x0 csc asec x0 Pow Mul Mul sqrt Add 1 Mul -1 Pow Mul x0 x0 -1 x0 x0 -1 