8 Calculati: 6345 36 27 165 40) b ㅁ (4\frac{1}{6}-1\frac{1}{9})-(\frac{11}{8}-\frac{7}{24})+(\frac{1}{10}+\frac{1}{15}); C (\frac{5}{9}+\frac{3}{2}+\frac{11}{18})-(\frac{11}{6}-\frac{1}{3}-\frac{1}{18})+(\frac{1}{6}+\frac{3}{4}+\frac{7}{12}); . (\frac{1}{21}+\frac{1}{14})-(\frac{1}{35}-\frac{1}{42})+(\frac{1}{14}-\frac{1}{21}); (\frac{7}{9}+\frac{17}{10}-\frac{1}{18})-(\frac{13}{27}-\frac{1}{18}+\frac{7}{9})+(\frac{1}{10}+\frac{1}{15}+\frac{1}{9})

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