15x 2 6x 7 July 8, 2019 16 32 64 128 X 2 15x 7 =- 6x 1 15x 2y *- 6x 7y /( 3xy 2 4x 2 15x 7 6x 2 10 6x 3 15x 2 20x 7 2x 1 15x2 6