`#tnvt`
`B=\frac{\sqrt{x}+3}{\sqrt{x}-2}-\frac{\sqrt{x}+2}{\sqrt{x}-3}+\frac{\sqrt{x}+2}{x-5\sqrt{x}+6}(x>=0,x\ne4,x\ne9)`
`=\frac{\sqrt{x}+3}{\sqrt{x}-2}-\frac{\sqrt{x}+2}{\sqrt{x}-3}+\frac{\sqrt{x}+2}{x-2\sqrt{x}-3\sqrt{x}+6}`
`=\frac{(\sqrt{x}+3)(\sqrt{x}-3)-(\sqrt{x}+2)(\sqrt{x}-2)+\sqrt{x}+2}{(\sqrt{x}-2)(\sqrt{x}-3)}`
`=\frac{x-9-x+4+\sqrt{x}+2}{(\sqrt{x}-2)(\sqrt{x}-3)}`
`=\frac{\sqrt{x}-3}{(\sqrt{x}-2)(\sqrt{x}-3)}`
`=\frac{1}{\sqrt{x}-2}`
