Simplify:

${\left(3^{-1}\times 4^{-1}\right)}^{-1}\times 5^{-1}$

Simplify:

$\left(3^2+2^2\right)\times {\left(\frac{1}{2}\right)}^3$

Simplify:

$\left(3^2-2^2\right)\times {\left(\frac{2}{3}\right)}^{-3}$

Simplify:

$\left[{\left(\frac{1}{3}\right)}^{-3}- {\left(\frac{1}{2}\right)}^{-3}\right] ÷{\left(\frac{1}{4}\right)}^{-3}$

Simplify:

$\left(2^2+3^2-4^2\right)÷{\left(\frac{3}{2}\right)}^2$

Simplify${\left(\frac{3}{2}\right)}^{-1}\times {\left(\frac{3}{2}\right)}^{-1}\times {\left(\frac{3}{2}\right)}^{-1}\times {\left(\frac{3}{2}\right)}^{-1}$. (Write in proper fraction)