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

Simplifiez $2^{2}\times (-5)^{2}$=

Simplifiez $\bigg(5^{7}\bigg)^{12}$=

Simplifiez $\dfrac{9^{7}\times 9^{12}}{9^{8}}$=

Simplifiez $11^{4}\times 11^{7}$=

Simplifiez $7^{2}\times\dfrac{7^{8}}{7^{11}}$=

Simplifiez $\dfrac{3^{6}\times 3^{-1}}{3^{-5}}$=

Simplifiez $4^{11}\times (-3)^{11}$=

Simplifiez $\dfrac{11^{12}\times 11^{7}}{11^{6}}$=

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