[tex]\bf ~~~~~~~~~~~~\textit{negative exponents}
\\\\
a^{-n} \implies \cfrac{1}{a^n}
\qquad \qquad
\cfrac{1}{a^n}\implies a^{-n}
\qquad \qquad
a^n\implies \cfrac{1}{a^{-n}}
\\\\
-------------------------------\\\\
\cfrac{x^0y^{-3}}{x^2y^{-1}}\implies \cfrac{1}{x^2y^{-1} y^3}\implies \cfrac{1}{x^2y^{-1+3}}\implies \cfrac{1}{x^2y^2}[/tex]
