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[tex] \frac{2}{2 - \sqrt{7} } + \frac{3}{2 + \sqrt{7} } + \frac{ \sqrt{7} }{3} [/tex]
[tex] \frac{2}{2 - \sqrt{7} } + \frac{3}{2 + \sqrt{7} } + \frac{ \sqrt{7} }{3} [/tex]
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