Solution Review: Compute an Expression Using Maths

class HelloWorld {
    public static void main( String args[] ) {
       double x = 55.0;
       double y = 18.0;
       double z = 51.0;
       double answer;
       double sum = Math.pow(x, 2) + Math.pow(y, 2);
       double sub = sum - Math.abs(z);
       answer = Math.cbrt(sub);
       System.out.println(answer);
    }
}