Multiply x and 3Multiply x and 1The x just gets copied along.The answer is xx3*x evaluates to 3xBecause of the minus sign3x becomes - 3xThe answer is -3xMultiply y and 2Multiply y and 1The y just gets copied along.The answer is yy2*y evaluates to 2y-3*x-2*y evaluates to -3x-2yThe answer is -3x-2y-2-3*x-2*y-2 evaluates to -3x-2y-2so the first one is right