3(✘-2)+1=✘-5(2✘-1) 4(2✘-1)-3(5✘+2)=3(2-✘) 4(
3(✘-2)+1=✘-5(2✘-1)4(2✘-1)-3(5✘+2)=3(2-✘)4(3...
3(✘-2)+1=✘-5(2✘-1) 4(2✘-1)-3(5✘+2)=3(2-✘)
4(3✘+2)-6(3-4✘)=7(4✘-3)
5y-1/6=7/3
✘-✘-1/2=2-✘+2/5
1/5(✘+12-1/3(✘-2)=1 展开
4(3✘+2)-6(3-4✘)=7(4✘-3)
5y-1/6=7/3
✘-✘-1/2=2-✘+2/5
1/5(✘+12-1/3(✘-2)=1 展开
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