23 6 x 4 2 5 July 8, 2019 16 32 64 128 23 6 x 2 5 1 4 3x 6 4 x 2 )+ 5 =-( x 4 )+ 23 23 6 chia x 2 5 1 4 23+- 6 6 4×5 23 23+- 5
