How do you simplify this equation?

we need to simplify the given expression [tex] (\frac{3x^-1}{4y^-1} )^-2 [/tex].
we know that [tex] (\frac{a^p}{b^q} )^n=\frac{a^pn}{b^qn} [/tex].
so here a and b is 3x and 4y .
p and q is -1.
where n is -2 .
so [tex] (\frac{3x^-1}{4y^-1} )^-2=\frac{3x^2}{4y^2} [/tex].
we have simplified the following expression.