Решите пожалуйста что можите

9.
$\frac{98^10}{14^8*7^12}$
$\frac{14^10*7^10}{14^8*7^12}$
$\frac{14^2}{7^2} = \frac{196}{49}=4$
10.
$\frac{2,4*10^3}{2*10^4} = \frac{2,4}{20}=0,12$
11.
$\frac{6^3}{5^3}= \frac{216}{125}=1,728$
$\frac{6^4}{5^4} = \frac{1296}{625}=2,0736$

$\frac{1}{12^4} = \frac{1}{20736}$
$\frac{1}{15^4}= \frac{1}{50625}$
12.
$\frac{7^k*7^2-7^k*7}{6*7^k}= \frac{7^k(7^2-7^1)}{6*7^k}= \frac{49-7}{6}= \frac{42}{6}=7$