30 1 5 x 2 3 July 8, 2019 16 32 64 128 30 x 2 9 1 5 x 3 1 4 x 3 )/ 2 5 =- 30 30 5 1 2 x (- 9 3 16 8 30 x 1 5 30 / 5 x 3 30×1 5
