8 1 9 2 3 4 July 8, 2019 16 32 64 128 (- 8 9 2 3 x (- 4 1 2 5 1 2 3 4 of 8 9 3 2x 9 )+ 1 2 4x 8 )= 55 9 1 2 divided by 4 3 8 (- 8 9 divided (- 2 3 x (- 4 1 2