2 9 x 2 13 July 8, 2019 16 32 64 128 2 9 x 2 13 simplified 2 9 x 135 A 2 9 x 2 13x 6a 2 x 9 )/ 2 2x 13 2 x 9 2 x 13 7 9 x 2 )- 13 3 3x 1 9 x 2 2 )- 13 =- 15 33 4 x 9 2 x 13 2 2x 9 2 x 13