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Imi trebuie ajutor! Dau coroana!
[tex]4\sqrt{7}+(\frac{2}{\sqrt{7}}+\frac{1}{\sqrt{5}})\cdot\sqrt{35}-(\frac{1}{\sqrt{125}}-\frac{1}{\sqrt{175}})\cdot25\sqrt{35}-7\sqrt{5}[/tex]