5x 16 5 x 4 July 8, 2019 16 32 64 128 5x 16 4 5 x 26 106 5x 2y 16 5x 2y 4 4x 2 5x 5x 16 4 5x =- 16 5x 5 x 5 x 5 x 5 x 5 5 x 5 x 5 5x - 16