Question 902994
14r to the 3rd power over r to the -8th power<pre>
{{{14r^3/r^(-8)}}}

Rule for a factor of a numerator of a denominator with
a negative exponent:

1.  If the factor with the negative exponent is in the NUMERATOR,
    move it to the DENOMINATOR, changing the sign of the exponent 
    to positive.

and vice-verse:

2.  If the factor with the negative exponent is in the DENOMINATOR,
    move it to the NUMERATOR, changing the sign of the exponent 
    to positive.

    {{{14r^3r^8}}}


Since there was no other factor in the denominator (other than 1 understood),
we did not need to show a denominator of 1. 

Now we add the exponents and get

    {{{14r^11}}}   <-- final answer

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[However in other problems where the only factor is a negative exponent
(other than 1) we must show the understood 1 factor in the numerator.]

Suppose your problem was:

{{{x^(-3)/x^2}}}

We would then bring the {{{x^(-3)}}} to the denominator. But the next step 
would be

{{{1/(x^3x^2)}}} not {{{cross(x^3x^2)}}}

We would have to put the understood 1 factor in the numerator.

And then add the exponents in the denominator:

{{{1/x^5}}}

Edwin</pre>