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

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

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

Simplifiez $\dfrac{11^{3}\times 11^{8}}{11^{-4}}$=

Simplifiez $9^{7}\times 9^{-2}\times 9^{1}$=

Simplifiez $3^{6}\times (-5)^{6}$=

Simplifiez $\dfrac{11^{-7}\times 11^{9}}{11^{8}}$=

Simplifiez $5^{-1}\times 5^{12}\times 5^{12}$=

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

Simplifiez $\dfrac{6^{1}\times 6^{12}}{6^{1}}$=