Simplifiez $\dfrac{\bigg(9^{-10}\bigg)^{3}\times9^{4}}{9^{-7}}$=

Simplifiez $\dfrac{\dfrac{8^{-10}}{8^{3}}}{\dfrac{8^{6}}{8^{-12}}}$=

Simplifiez $\dfrac{\bigg(7^{6}\bigg)^{3}\times7^{-9}}{7^{5}}$=

Simplifiez $8^{-5}\times\dfrac{\sqrt{8}^{-4}}{8^{-20}}$=

Simplifiez $\dfrac{\dfrac{9^{11}}{9^{8}}}{\dfrac{9^{-2}}{9^{6}}}$=

Simplifiez $\bigg(\dfrac{4^{9}\times4^{-5}}{4^{-5}}\bigg)^{2}$=

Simplifiez $\dfrac{\bigg(5^{3}\bigg)^{2}\times5^{7}}{5^{-12}}$=

Simplifiez $\dfrac{\dfrac{6^{-11}}{6^{5}}}{\dfrac{6^{-3}}{6^{3}}}$=

Simplifiez $\bigg(\dfrac{2^{-12}\times2^{-6}}{2^{11}}\bigg)^{-3}$=

Simplifiez $\dfrac{\dfrac{7^{-11}}{7^{-6}}}{\dfrac{7^{-1}}{7^{-6}}}$=