The first step for solving this problem is to reduce the fraction with

.

Determine the sign of the fraction.

Now if a negative exponent is in the numerator,, then you must move the expression to the denominator and then make the exponent positive. This will change the expression to the following:

Lastly,, use the commutative property to reorder the terms on the bottom of the fraction.

Since we cannot simplify this expression any further,, the correct answer to this question is

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