Applicare la formula: $a^b$$=a^b$, dove $a=\frac{2}{3}$, $b=2$ e $a^b=\left(\frac{2}{3}\right)^2$

Applicare la formula: $\frac{a}{b}c$$=\frac{ca}{b}$, dove $a=4$, $b=9$, $c=-1$, $a/b=\frac{4}{9}$ e $ca/b=- \frac{4}{9}$

Applicare la formula: $\frac{a}{b}+c$$=\frac{a+cb}{b}$, dove $a/b+c=3x^3-\frac{4}{9}+2x-1$, $a=-4$, $b=9$, $c=-1$ e $a/b=-\frac{4}{9}$

Applicare la formula: $a+b$$=a+b$, dove $a=-4$, $b=-9$ e $a+b=-4-9$