7. In the expansion of $\left(x+\frac{4}{x}-4\right)^{5}$, the coefficient of $x^{3}$ is $\qquad$ (answer with a specific number).
$$
\begin{array}{l}
\text { II.7.180. } \\
\text { From }\left(x+\frac{4}{x}-4\right)^{5}=\frac{(x-2)^{10}}{x^{5}} \text {, we know that }\left(x+\frac{4}{x}-4\right)^{5}
\end{array}
$$

the coefficient of $x^{3}$ in the expansion is $\mathrm{C}_{10}^{2}(-2)^{2}=180$.