Question

write two monomials whose greatest common factor is 4m

Answer 1

Stand by !
The next thing you will read in this block
will be two monomials whose greatest
common factor is  4m  :

         68 x n p m q r y s
and
       124 a b g c f m t z
____________________________

And now . . .
Here are two more:

         8 m x
and
       12 k m