`M=(\frac{4x}{\sqrt{x}-1}-\frac{\sqrt{x}-2}{x-3\sqrt{x}+2}).\frac{\sqrt{x}-1}{x^2}`
`<=> M=(\frac{4x}{\sqrt{x}-1}-\frac{\sqrt{x}-2}{x-2\sqrt{x}-\sqrt{x}+2}).\frac{\sqrt{x}-1}{x^2}`
`<=>M=(\frac{4x}{\sqrt{x}-1}-\frac{\sqrt{x}-2}{(\sqrt{x}-2)(\sqrt{x}-1)}).\frac{\sqrt{x}-1}{x^2}`
`<=>M=(\frac{4x}{\sqrt{x}-1}-\frac{1}{\sqrt{x}-1})\frac{\sqrt{x}-1}{x^2}`
`<=>M=\frac{4x-1}{x^2}`
