2x 2y 2xy 2 July 8, 2019 16 32 64 128 2x 2y 2xy 2 4xy X 3 2x 2y 2xy 2 y 3 2x 2y x 2 2xy y 2y 2x 2 2xy 3xy 2x 3 4x 2y 2xy 2 2x 3 5x 2y 2xy 2 5y 3 2x 3y 4x 2y 2 2xy 3 2x + 3y