atan Mul sec asin x0 sec sech Pow 3 x6 
Mul Mul sec sech Pow 3 x6 Mul Mul tan asin x0 sec asin x0 Pow sqrt Add 1 Mul -1 Mul x0 x0 -1 Pow Add 1 Mul Mul sec asin x0 sec sech Pow 3 x6 Mul sec asin x0 sec sech Pow 3 x6 -1 