Tính \(-\left( \frac{2}{7} - \frac{13}{8} \right) + \left( \frac{3}{8} + \frac{2}{7} \right)\)

Tính
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2) \(-\left( \frac{2}{7} - \frac{13}{8} \right) + \left( \frac{3}{8} + \frac{2}{7} \right);\)

4) \(\frac{11}{24} - \frac{5}{41} + \frac{13}{24} + 0,5 - \frac{36}{41};\)

6) \(\frac{15}{34} - \frac{7}{27} + \frac{19}{34} - \frac{20}{27} + \frac{21}{7};\)