public class Zad {
        public static void main(String[] args){
            double x = 10.0;
            double y = 20.0;
            double z = 1.0;
            double u;

            u = x+2.5;
            u = u+y;
            x = x-z;
            x = x-5.7;
            u = u/x;
            u = u*z;
            u = u+y;
            u = u*y;
            y = z+1.2;
            z = z-2.4;
            z = y/z;
            u = u+z;
        System.out.println(u);
        }
}