2 3 3 5 x 15 4 July 8, 2019 16 32 64 128 X 3 2 5 3 4 2x 16 15 2 5 5x 3 )+ 3 5 4x 15 2 4x 3 )+ 5 =- 6 x 3 )+ 10x 15 2 x 5 )- 3 x 4 )=- 6 15 (- 3 15 x 4 5x 2 )/ 3 7x 3 )/ 5 15 x 2 mũ 3 4 x 3 5 x 7 2 + 3 + 4 + 5 + 6 2 15 x 3