7m 2 5m 6 July 8, 2019 16 32 64 128 7m 3 2 5m 2 )+ 6 7m 2 5m 9 )+( 3m 2 6 3m 7m 5 2 5m 6 2 5m 6 2n )- 7m 8 5m 2 7m 6 0 6 m 7 2 7m