Question 257955
A negative exponent means use the reciprocal.
In the case of x/y it becomes y/x
In the case of z It becomes 1/z
and in the case of 1/w it becomes w
 Let's start with the numerator where every term has a negative exponent.
{{{ (2^-3*x^-4*y^-3)/(x^3*y^-2)^-1}}}

{{{1/(2^3*x^4*y^3)}}}
But we also notice that the entire denominator has a negative exponent.
So the fraction becomes:

{{{(x^3*y^-2)/(2^3*x^4*y^3)}}}

But the y term in the numerator has a negative exponent.

{{{(x^3/(2^3*x^4*y^3*y^2))}}}

We have dealt with all the negative exponents. Now to reduce and combine
2^3=8
x^3/x^4=1/x
y^2*y^3=y^5

{{{1/(8xy^5))}}}