Simplifiez $7^{-10}\times\dfrac{7^{9}}{7^{3}}$=

Simplifiez $7^{-9}\times 5^{-9}$=

Simplifiez $3^{4}\times 2^{4}$=

Simplifiez $\dfrac{11^{-3}\times 11^{-4}}{11^{-2}}$=

Simplifiez $3^{-4}\times 3^{2}$=

Simplifiez $8^{-12}\times 8^{7}$=

Simplifiez $\bigg(3^{6}\bigg)^{10}$=

Simplifiez $6^{5}\times\dfrac{6^{3}}{6^{8}}$=

Simplifiez $5^{-4}\times\dfrac{5^{-7}}{5^{2}}$=

Simplifiez $\bigg(5^{-9}\bigg)^{3}$=