4 5 7 x 4 5 7 July 8, 2019 16 32 64 128 4 5 7 x (- 6 5 7 4 7 x 4 5 x 7 9 4 5 x 3 7 4 5 x 4 7 5 4 3 4 7 4 x 2 2 7 5 9 5 x 7 = 35 4 5 x 7 4 + 4 =5
