acsc Add Pow sech exp pi x0 x0 
Mul -1 Mul Add Mul Pow sech exp pi Add x0 -1 Mul sech exp pi log sech exp pi 1 Pow Mul Mul sqrt Add 1 Mul -1 Pow Mul Add Pow sech exp pi x0 x0 Add Pow sech exp pi x0 x0 -1 Add Pow sech exp pi x0 x0 Add Pow sech exp pi x0 x0 -1 