Applicare la formula: $x\left(a+b\right)$$=xa+xb$, dove $a=5a^5$, $b=\frac{4}{7}$, $x=-\frac{4}{7}+5a^6$ e $a+b=5a^5+\frac{4}{7}$

Applicare la formula: $x\left(a+b\right)$$=xa+xb$, dove $a=-\frac{4}{7}$, $b=5a^6$, $x=5a^5$ e $a+b=-\frac{4}{7}+5a^6$

Applicare la formula: $x\left(a+b\right)$$=xa+xb$, dove $a=-\frac{4}{7}$, $b=5a^6$, $x=\frac{4}{7}$ e $a+b=-\frac{4}{7}+5a^6$

Applicare la formula: $x^mx^n$$=x^{\left(m+n\right)}$, dove $x=a$, $m=5$ e $n=6$

Applicare la formula: $\frac{a}{b}\frac{c}{f}$$=\frac{ac}{bf}$, dove $a=4$, $b=7$, $c=-4$, $a/b=\frac{4}{7}$, $f=7$, $c/f=-\frac{4}{7}$ e $a/bc/f=\frac{4}{7}\cdot -\frac{4}{7}$