13 5 x 7 4 July 8, 2019 16 32 64 128 7 13 5 26 x 13 4 5 x 7 )= 3 x 4 )- 13 5 3 13 x 7 5 13 4 8 13 2x 5 8x 7 x 4x 1 X 5 x 7 4x 40 13 x 5 x 6y 13 3x 4y 7 7 6 9 13 x 5 4 5 x 4 2 7 13 4 13 x 5 7 chia 1 3 7 43 13 x 5 2 ))