m - 9
3 ( m - n )
1/3( m - n )
m - 1
2m (m+1)/4
m + 1
2 m^2
m - 15 = 8
m + 9
2 m
m + 3/5= 7/2
4^3 / 8 = 8
m^3 + 8 = 72
3 m + n
3( m + n )
m – n = 9