Simplifiez $7^{2}\times 5^{2}$=

Simplifiez $\bigg(\dfrac{7^{-8}}{7^{-7}}\bigg)^{5}$=

Simplifiez $6^{11}\times (-2)^{11}$=

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

Simplifiez $5^{-6}\times\dfrac{5^{9}}{5^{10}}$=

Simplifiez $2^{10}\times 2^{5}\times 2^{6}$=

Simplifiez $\bigg(5^{6}\bigg)^{5}$=

Simplifiez $\bigg(9^{8}\bigg)^{6}$=

Simplifiez $\dfrac{2^{5}\times 2^{-12}}{2^{12}}$=

Simplifiez $2^{6}\times 2^{-8}\times 2^{8}$=