1 2x 5 2 7 2x 3 4 July 8, 2019 16 32 64 128 3x 4 (- 2x 1 )= 3 x 5 )+ 2 2x 7 )- 3 4 1 2x 3 7 )- 2 8 5 2x 2x 7
