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