Решить выражения.

1. \( \sqrt[3]{\frac{9x^3}{y^3}} = \frac{\sqrt[3]{9}x}{y} \); 2. \( \sqrt[3]{\frac{25x^{13}y^{11}}{27z^8}} = \frac{\sqrt[3]{25}x^4y^3}{3z^2} \); 3. \( \sqrt{\frac{44}{108x^2yz^5}} = \frac{2\sqrt{11}}{6xz^2\sqrt{yz}} \); 4. \( \sqrt{\frac{9x^4y^7}{16z^{14}}} = \frac{3x^2y^3\sqrt{y}}{4z^7} \).