$\begin{array}{11}(1)\; -2\sqrt{\frac{1+\sqrt x}{1- \sqrt x}} + C \\(2)\; \; -2\sqrt{\frac{1-\sqrt x}{1+\sqrt x}} + C \\ (3) \; \; -\sqrt{\frac{1-\sqrt x}{1+ \sqrt x}} + C \\ (4)\; \; 2\sqrt{\frac{1+\sqrt x}{1- \sqrt x}} + C \end{array} $