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[tex] \frac{3}{5} + \frac{2}{7} [/tex]
[tex]1 \frac{1}{2} \div 2 \frac{2}{3} [/tex]
[tex] \frac{7}{8} - \frac{1}{2} [/tex]
[tex]3 \frac{1}{2} \times \frac{3}{5} [/tex]
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