How to add subtract multiply and divide two numbers without using third variable

1. How to add ,subtract,multiply and divide two numbers without using third variable

#include<stdio.h>

void main()
{
        int a=5,b=2;
        printf("Sum is : "%d,(a+b));
        printf("Subtraction  is : "%d,(a-b));
        printf("Multiplication is : "%d,(a*b));
        printf("Division is : "%d,(a/b));
}

Output :
Sum is: 7
Subtraction  is : 3
Multiplication is : 10
Division is : 2