For $b\ne 0$, what is the value of $b^0$?

Which expression is equivalent to $x^{-6}$ for $x\ne 0$?

Which expression correctly applies the power rules to $(2x^3{y}^{-2}{)}^2$?

Simplify $\frac{{(-3x^2)}^2{y}^{-1}}{3x}$.

Simplify ${\left(\frac{m^5{n}^2}{m^3{n}^6}\right)}^2$.