For example:

Input Result
1 3
5 7
1+3=4
7-5=2

#include <bits/stdc++.h>

using namespace std;

int main ()  

{

int x1,y1,x2,y2;

cin >> x1 >> y1;

cin >> x2 >> y2;

cout << x1 << "+" << y1 << "=" << (x1+y1) << endl;

if (y2>x2){cout << y2 << "-" << x2 << "=" << (y2-x2);}else {cout << x2 << "-" << y2 << "=" << (x2-y2);};

return 0;

}