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23−12=...\frac{2}{3}-\frac{1}{2}=...32−21=...
2−13×2=16\frac{2-1}{3\times2}=\frac{1}{6}3×22−1=61
2−13−2=11=1\frac{2-1}{3-2}=\frac{1}{1}=13−22−1=11=1
46−26=26\frac{4}{6}-\frac{2}{6}=\frac{2}{6}64−62=62
2−26=0\frac{2-2}{6}=062−2=0