Rút gọn: \[ \left( \frac{2 + \sqrt{x}}{2 - \sqrt{x}} - \frac{4x}{x - 4} - \frac{2 - \sqrt{x}}{2 + \sqrt{x}} \right) : \frac{x - \sqrt{x}}{2\sqrt{x} - x} \]

----- Nội dung ảnh -----
Rút gọn:
\[
\left( \frac{2 + \sqrt{x}}{2 - \sqrt{x}} - \frac{4x}{x - 4} - \frac{2 - \sqrt{x}}{2 + \sqrt{x}} \right) : \frac{x - \sqrt{x}}{2\sqrt{x} - x}
\]