acosh Mul Add acos x0 -0.250000000000000 5 
Mul Mul 5 Mul -1 Pow sqrt Add 1 Mul -1 Mul x0 x0 -1 Pow Mul sqrt Add Mul Add acos x0 -0.250000000000000 5 -1 sqrt Add 1 Mul Add acos x0 -0.250000000000000 5 -1 