Tính
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Bài 3. Tính.
a) \(\left( \frac{1}{2} \, \frac{13}{14} \right) \cdot \frac{5}{7} - \left( \frac{2}{21} + \frac{1}{7} \right) \cdot \frac{5}{7}\)
b) \(\frac{3}{5} \cdot \left( -\frac{1}{15} \right) + \frac{3}{5} \cdot \left( -\frac{1}{3} - \frac{1}{15} \right)\)
c) \([6 + 2 \cdot (3^3 - 17)] : 2\)
d) \(\left( \frac{2}{3} + \frac{1}{2} \right)^2 \cdot \frac{6}{5} \cdot \frac{1}{5}\)
Bài 3. Tính.
a) \(\left( \frac{1}{2} \, \frac{13}{14} \right) \cdot \frac{5}{7} - \left( \frac{2}{21} + \frac{1}{7} \right) \cdot \frac{5}{7}\)
b) \(\frac{3}{5} \cdot \left( -\frac{1}{15} \right) + \frac{3}{5} \cdot \left( -\frac{1}{3} - \frac{1}{15} \right)\)
c) \([6 + 2 \cdot (3^3 - 17)] : 2\)
d) \(\left( \frac{2}{3} + \frac{1}{2} \right)^2 \cdot \frac{6}{5} \cdot \frac{1}{5}\)