X 9 7 8 July 8, 2019 16 32 64 128 9 x 7 )= 81 X 9 8x 7 X 7 9 8 5 X 9 8 7 4 3 x 9 7 8 9 x 8 7 6 Х 4 9 =- 7 8 2 9 x 7 8 1 + 8 x + 7 = 9 10 9 x 7 8 16 x 9 8 =- 7 5 9 х 7 8 9 7 8 x 11 1 4 f 9 7 8 x 13 f yamaha 9 7 8 x 12 f