7 m 1 ) 3 =-( 2m 18 )- 4 July 8, 2019 16 32 64 128 7 m 1 )+ 3 =-( 2m 18 )- 4 2 / m = 2 1/7 / 3 4/7 3(2 4 - 1 1m) = 2 7m + 3 2