A negative exponent means that factor is on the wrong side of the fraction.
For example,
can be written as
and to get rid of that negative exponent, the
gets moved to the bottom and the exponent becomes positive.
And if the exponent is negative in the bottom, then you move that factor to the top:
and we just write that as
, since the "over 1" isn't needed.
The formatting of your question leaves me guessing a bit, but I think your original expression was
. Based on what we just talked about above, how would you rewrite that with a positive exponent?