The first step for solving this expression is to write the division as a fraction.

× m³
Factor out 2 from the numerator (top) of the fraction.

× m³
Reduce the fraction with 2.
(-2

+

- 7

)m³
Lastly,, distribute m³ through the parenthesis to get your final answer.
-2

+

- 7

Let me know if you have any further questions.
:)