Tính giá trị biểu thức
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10) \( \frac{4}{9} \div \left( \frac{1}{7} \right) + 6 \cdot \frac{5}{9} \div \left( \frac{1}{7} \right) \)
11) \( \left( -\frac{2}{3} + \frac{3}{7} \right) \div \frac{4}{5} + \left( -\frac{1}{3} + \frac{4}{7} \right) \div \frac{4}{5} \)
12) \( \frac{5}{9} \div \left( \frac{1}{11} - \frac{5}{22} \right) + \frac{5}{9} \div \left( \frac{1}{15} - \frac{2}{3} \right) \)
10) \( \frac{4}{9} \div \left( \frac{1}{7} \right) + 6 \cdot \frac{5}{9} \div \left( \frac{1}{7} \right) \)
11) \( \left( -\frac{2}{3} + \frac{3}{7} \right) \div \frac{4}{5} + \left( -\frac{1}{3} + \frac{4}{7} \right) \div \frac{4}{5} \)
12) \( \frac{5}{9} \div \left( \frac{1}{11} - \frac{5}{22} \right) + \frac{5}{9} \div \left( \frac{1}{15} - \frac{2}{3} \right) \)