Evaluate: ${\left\{{\left(\frac{3}{5}\right)}^{-2}\right\}}^{-2}$

Evaluate: $\left(5^{-1}\times 3^{-1}\right)÷6^{-1}$

Find $x,$ if $9\times 3^x={\left(27\right)}^{2x-3}$.

Compute: $1^8\times 3^0\times 5^3\times 2^2$

Compute: ${\left(4^7\right)}^2\times {\left(4^{-3}\right)}^4$

Compute: ${\left(2^{-9}÷2^{-11}\right)}^3$

Compute: ${\left(\frac{2}{3}\right)}^{-4}\times {\left(\frac{27}{8}\right)}^{-2}$

Compute: ${\left(\frac{56}{28}\right)}^0÷{\left(\frac{2}{5}\right)}^3\times \frac{16}{25}$