Add Mul -2 atan acos Pow x0 -0.989992496600445 x0 
Add Mul -2 Mul Mul -1 Mul Mul Pow x0 -1.98999249660045 -0.989992496600445 Pow sqrt Add 1 Mul -1 Mul Pow x0 -0.989992496600445 Pow x0 -0.989992496600445 -1 Pow Add 1 Mul acos Pow x0 -0.989992496600445 acos Pow x0 -0.989992496600445 -1 1 