4m 3 2m 8 July 8, 2019 16 32 64 128 8m 4m 3 2m 15m 4m 3 21 2m 8 M 3 2m 2 4m 8 0 9 2m 3 )- 8 4m 7 3 2m 9 )= 9 4m 8 M 3 2m 2 4m 8 3 2m 5 )( 8 4m 4 m 4 m 3m 2 m