Rút gọn và tính
----- Nội dung dịch tự động từ ảnh -----
1) \(\left( \frac{-25}{27} \ \frac{31}{42} \right) - \left( \frac{-7}{27} \ \frac{3}{42} \right)\)
2) \(\left( \frac{-13}{25} \ \frac{5}{32} \right) \cdot \left( \frac{-13}{25} \right) \cdot (-64)\)
3) \(\frac{3}{8} - \frac{23}{14} \ - \frac{3}{8} - \frac{9}{14}\)
4) \(\frac{5}{12} + \frac{4}{5} - \frac{3}{4} + \frac{1}{4}\)
1) \(\left( \frac{-25}{27} \ \frac{31}{42} \right) - \left( \frac{-7}{27} \ \frac{3}{42} \right)\)
2) \(\left( \frac{-13}{25} \ \frac{5}{32} \right) \cdot \left( \frac{-13}{25} \right) \cdot (-64)\)
3) \(\frac{3}{8} - \frac{23}{14} \ - \frac{3}{8} - \frac{9}{14}\)
4) \(\frac{5}{12} + \frac{4}{5} - \frac{3}{4} + \frac{1}{4}\)