Applicare la formula: $\left(a+b\right)^4$$=a^4+4a^3b+6a^2b^2+4ab^3+b^4$, dove $a=\frac{2}{3}m$, $b=-4n$ e $a+b=\frac{2}{3}m-4n$

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

Applicare la formula: $\frac{a}{b}c$$=\frac{ca}{b}$, dove $a=8$, $b=27$, $c=-16$, $a/b=\frac{8}{27}$ e $ca/b=-16\cdot \left(\frac{8}{27}\right)m^3n$

Applicare la formula: $\frac{a}{b}c$$=\frac{ca}{b}$, dove $a=4$, $b=9$, $c=6$, $a/b=\frac{4}{9}$ e $ca/b=6\cdot \left(\frac{4}{9}\right)m^2\left(-4n\right)^2$