#include <iostream>

using namespace std;

int main()

{

int x, y, z;

x = 2;
y = 4;
z = 5;

if (x == 3 && (y == 4 || z == 5))
  cout << "it's true" << endl;
else
  cout << "it's false" << endl;

if ((x == 3 && y == 4) || z == 5)
  cout << "it's true" << endl;
else
  cout << "it's false" << endl;
  
if (x == 3 && y == 4 || z == 5)
  cout << "it's true" << endl;
else
  cout << "it's false" << endl;

//*****************************

if ((z == 5 || x == 3) && y == 7)
  cout << "it's true" << endl;
else
  cout << "it's false" << endl;

if (z == 5 || (x == 3 && y == 7))
  cout << "it's true" << endl;
else
  cout << "it's false" << endl;

if (z == 5 || x == 3 && y == 7)
  cout << "it's true" << endl;
else
  cout << "it's false" << endl;

return 0;

// results are false, true, true, 
//             false, true, true

}