The sum of the monomials 5x * 2Y, 3x * 2Y * 2, 4yx * 2 is

The sum of the monomials 5x * 2Y, 3x * 2Y * 2, 4yx * 2 is

5X*2Y+3X*2Y*2+4YX*2
=10XY+6XY+8XY
=(10+6+8)XY
=24XY