(6/11)^9•(1 5/6)^7= Помогите пожалуйстааа

Решите задачу:

$(\frac{6}{11})^9*( 1\frac{5}{6})^7= (\frac{6}{11})^9*( \frac{11}{6})^7 = \frac{6^9*11^7}{11^9*6^7}= \frac{6^{9-7}}{11^{9-7}}= \frac{6^2}{11^2}= \frac{36}{121} \\\\(\frac{6}{11})^9*( 1\frac{5}{6})^7= (\frac{6}{11})^9*( \frac{11}{6})^7=(\frac{6}{11})^9*( \frac{6}{11})^{-7}= (\frac{6}{11})^{9-7}=\\\\=( \frac{6}{7} )^2 = \frac{36}{121}$