Giải các pt
1, $x=(2013+\sqrt{x})(1-\sqrt{1-\sqrt{x}})^{2}$
2, $(\sqrt{3x+1}+\sqrt{x-7})\sqrt{x}=2(x+4)$
3, $\sqrt{2x+1}+\sqrt{17-2x}=x^{4}-8x^{3}+17x^{2}-8x+22$
4, $\sqrt{x+\frac{3}{x}}=\frac{x^{2}+7}{2(x+1)}$
5, $\sqrt{\frac{x+7}{x+1}}+8=2x^{2}+\sqrt{2x-1}$