Applicare la formula: $\frac{a^m}{a^n}$$=a^{\left(m-n\right)}$, dove $a^n=a^2$, $a^m=a^{11}$, $a^m/a^n=\frac{30a^{11}b^9}{10a^2b^4}$, $m=11$ e $n=2$

Applicare la formula: $\frac{a^m}{a^n}$$=a^{\left(m-n\right)}$, dove $a^n=b^4$, $a^m=b^9$, $a=b$, $a^m/a^n=\frac{30a^{9}b^9}{10b^4}$, $m=9$ e $n=4$

Applicare la formula: $\frac{ab}{c}$$=\frac{a}{c}b$, dove $ab=30a^{9}b^{5}$, $a=30$, $b=a^{9}b^{5}$, $c=10$ e $ab/c=\frac{30a^{9}b^{5}}{10}$