4m 7 2 m 5 July 8, 2019 16 32 64 128 M 2 4m 7 5t 20t 4m 6 7 2m )= 36 5m 4m 3m 7 2m 5 5m 7 2m 4m 15 7 2m 5n 4m n 2 7m
