Rút gọn \[ \frac{7\sqrt{7} - \sqrt{14}}{7 - \sqrt{2}} - \frac{2}{\sqrt{7} - \sqrt{5}} \]

----- Nội dung ảnh -----
\[
\frac{7\sqrt{7} - \sqrt{14}}{7 - \sqrt{2}} - \frac{2}{\sqrt{7} - \sqrt{5}}
\]