Applicare la formula: $\frac{a^m}{a^n}$$=a^{\left(m-n\right)}$, dove $a^n=x^4$, $a^m=x^7$, $a=x$, $a^m/a^n=\frac{-1684x^7y^{10}}{-128x^4y^{14}}$, $m=7$ e $n=4$

Applicare la formula: $\frac{a^m}{a^n}$$=\frac{1}{a^{\left(n-m\right)}}$, dove $a=y$, $m=10$ e $n=14$

Applicare la formula: $a+b$$=a+b$, dove $a=14$, $b=-10$ e $a+b=14-10$

Applicare la formula: $\frac{ab}{c}$$=\frac{a}{c}b$, dove $ab=-1684x^{3}$, $a=-1684$, $b=x^{3}$, $c=-128$ e $ab/c=\frac{-1684x^{3}}{-128y^{4}}$