Applicare la formula: $\frac{a}{a}$$=1$, dove $a=4$ e $a/a=\frac{4x^8y^3}{4x^6y^6}$

Applicare la formula: $\frac{a^m}{a^n}$$=a^{\left(m-n\right)}$, dove $a^n=x^6$, $a^m=x^8$, $a=x$, $a^m/a^n=\frac{x^8y^3}{x^6y^6}$, $m=8$ e $n=6$

Applicare la formula: $\frac{a^m}{a^n}$$=\frac{1}{a^{\left(n-m\right)}}$, dove $a=y$, $m=3$ e $n=6$

Applicare la formula: $a+b$$=a+b$, dove $a=6$, $b=-3$ e $a+b=6-3$