$$(\frac{2\sqrt{x}+x}{\sqrt{x^{3}-1}}-\frac{1}{\sqrt{x}-1})\div(1-\frac{\sqrt{x}+2}{x+\sqrt{x}+1})$$
$\frac{\left(\sqrt{x}+1\right)\left(x+\sqrt{x}+1\right)\left(-\sqrt{x^{3}-1}+x^{\frac{3}{2}}+x-2\sqrt{x}\right)}{\sqrt{x^{2}+x+1}\left(x-1\right)^{\frac{5}{2}}}$
