Simplify the question with positive exponents

I can do both

remember
(ab)/(cd)=(a/c)(b/d)=(a/d)(b/c)

also exponential laws
(x^m)/(x^n)=x^(m-n)

and
(x^m)^n=x^(mn)
and
x^-m=1/(x^m)
and
(xyz)^m=(x^m)(y^m)(z^m)

first apply the exponents outside

(3x^-1y)^-2=(3^-2)((x^-1)^-2)(y^-2)=(1/9)x^2y^-2

bottom
(2x^2y^-2)^3=(2^3)((x^2)^3)((y^-2)^3)=8x^6y^-6

now we have

that equals
then
2-6=-4
-2-(-6)=4
=