×-12/25=1/5 2×1/6=5/6 2/3-×+1/7=9/14
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×-12/25=1/52×1/6=5/62/3-×+1/7=9/14×-12/25=1/52×1/6=5/62/3-×+1/7=9/14×-12/25=1/52×1/6=5/62/3-×+1/7=9/
×-12/25=1/5 2×1/6=5/6 2/3-×+1/7=9/14
×-12/25=1/5 2×1/6=5/6 2/3-×+1/7=9/14
×-12/25=1/5 2×1/6=5/6 2/3-×+1/7=9/14
先采必答,不答是你孙!