Tính

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4) \( 7 + \left( \frac{7}{12} - \frac{1}{2} + 3 \right) - \left( \frac{1}{12} + 5 \right) \)

5) \( \frac{17}{11} - \left( \frac{6}{5} - \frac{16}{11} \right) + \frac{26}{5} \)

6) \( \frac{39}{5} + \left( \frac{9}{4} - \frac{9}{5} \right) - \left( \frac{5}{4} + \frac{6}{7} \right) \)