53 I think is the answer.
Answer:
C
Step-by-step explanation:
If a number is to the power of a negative number, then it is just that number's reciprocal: e.g. y⁻ˣ = 
Therefore, m⁻² will be m² in the denominator, as n⁻³ will be n³ in the numerator.
That will look like
.
So, that is C.