M 4 2m 2 9 July 8, 2019 16 32 64 128 4 m 9 )= 2 2m 1 )- 40 3 m 2 )- 4 2m 9 4 m 9 )= 2 2m d 40 2 m 4 m 2 4 m M2 + 4m + 4