`B=((2\sqrt{x}+x)/(x\sqrt{x}-1)-1/(\sqrt{x}-1))(1-(\sqrt{x}+2)/(x+\sqrt{x}+1)) (x>0;x\ne1)`

`B=[(2\sqrt{x}+x)/((\sqrt{x}-1)(x+\sqrt{x}+1))-1/(\sqrt{x}-1)](x+\sqrt{x}+1-\sqrt{x}-2)/(x+\sqrt{x}+1)`

`B=(2\sqrt{x}+x-x-\sqrt{x}-1)/((\sqrt{x}-1)(x+\sqrt{x}+1)). (x-1)/(x+\sqrt{x}+1)`

`B=(\sqrt{x}-1)/((\sqrt{x}-1)(x+\sqrt{x}+1)) . (x-1)/(x+\sqrt{x}+1)`

`B=1/(x+\sqrt{x}+1) . (x-1)/(x+\sqrt{x}+1)`

`B=(x-1)/((x+\sqrt{x}+1)^2)`