[tex]\it |\underbrace{\it \sqrt7-\sqrt5}_{>0}|+|2+\sqrt5|-|\underbrace{\it \sqrt7-3}_{<0}|+2=\sqrt7-\underline{\underline{\sqrt5}}+2+\underline{\underline{\sqrt5}}-(3-\sqrt7)+2=\\ \\ =\underline{\underline{\sqrt7}}+2-3+\underline{\underline{\sqrt7}}+2=1+2\sqrt7[/tex]
