x^4/x^9

$$\\\frac{x^4}{x^9}=\frac{xxxx}{xxxxxxxxx}=\frac{1}{x^5}\\\\
$all the other x'es cancel out$\\\\
0r \quad \frac{x^4}{x^9}=x^{4-9}=x^{-5}\\\\
\frac{1}{x^5}=x^{-5}$$

What happened to the question???