Aplicamos a regra: $x\left(a+b\right)$$=xa+xb$, onde $a=3x^3y^2$, $b=-\frac{3}{5}$, $x=3x^3y^2-\frac{4}{7}$ e $a+b=3x^3y^2-\frac{3}{5}$

Aplicamos a regra: $x\left(a+b\right)$$=xa+xb$, onde $a=3x^3y^2$, $b=-\frac{4}{7}$, $x=3x^3y^2$ e $a+b=3x^3y^2-\frac{4}{7}$

Aplicamos a regra: $x\left(a+b\right)$$=xa+xb$, onde $a=3x^3y^2$, $b=-\frac{4}{7}$, $x=-\frac{3}{5}$ e $a+b=3x^3y^2-\frac{4}{7}$

Aplicamos a regra: $\frac{a}{b}\frac{c}{f}$$=\frac{ac}{bf}$, onde $a=-3$, $b=5$, $c=-4$, $a/b=-\frac{3}{5}$, $f=7$, $c/f=-\frac{4}{7}$ e $a/bc/f=-\frac{3}{5}\cdot -\frac{4}{7}$