Simplifiez $7^{-1}\times\dfrac{\sqrt{7}^{-8}}{7^{-11}}$=

Simplifiez $\dfrac{\dfrac{5^{-1}}{5^{1}}}{\dfrac{5^{-8}}{5^{-9}}}$=

Simplifiez $\bigg(\dfrac{4^{7}\times\sqrt{4}^{-4}}{4^{-9}}\bigg)^{-2}$=

Simplifiez $7^{5}\times\dfrac{\sqrt{7}^{-6}}{7^{14}}$=

Simplifiez $\dfrac{\bigg(3^{-6}\bigg)^{-4}\times3^{-1}}{3^{2}}$=

Simplifiez $\dfrac{\bigg(5^{-4}\bigg)^{2}\times5^{6}}{5^{-10}}$=

Simplifiez $\bigg(\dfrac{7^{-2}\times\sqrt{7}^{-22}}{7^{-12}}\bigg)^{-3}$=

Simplifiez $3^{-11}\times\dfrac{\sqrt{3}^{6}}{3^{-20}}$=

Simplifiez $\bigg(\dfrac{10^{12}\times\sqrt{10}^{4}}{10^{5}}\bigg)^{2}$=

Simplifiez $\bigg(\dfrac{11^{2}}{11^{-9}}\bigg)^{4}\times\dfrac{11^{-5}}{11^{-9}}$=