rút gọn \(\left(\frac{2x+1}{x\sqrt{x}-1}+\frac{1}{1-\sqrt{x}}\right):\left(1-\frac{x-2}{x\sqrt{x}+1}\right)\)

\(\left(\frac{\sqrt{x}-4}{x-2\sqrt{x}}-\frac{3}{2-\sqrt{x}}\right):\left(\frac{\sqrt{x}+2}{\sqrt{x}}-\frac{\sqrt{x}}{\sqrt{x}-2}\right)\)

rút gọn