Applicare la formula: $\left(a+b\right)^2$$=a^2+2ab+b^2$, dove $a=\frac{1}{3}a^5b$, $b=-\frac{1}{5}a^4b$ e $a+b=\frac{1}{3}a^5b-\frac{1}{5}a^4b$

Applicare la formula: $x^mx^n$$=x^{\left(m+n\right)}$, dove $x=a$, $m=5$ e $n=4$

Applicare la formula: $\left(ab\right)^n$$=a^nb^n$

Applicare la formula: $\frac{a}{b}\frac{c}{f}$$=\frac{ac}{bf}$, dove $a=2$, $b=3$, $c=-1$, $a/b=\frac{2}{3}$, $f=5$, $c/f=-\frac{1}{5}$ e $a/bc/f=\frac{2}{3}\cdot -\frac{1}{5}a^{9}b^2$