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![](https://blog.hocmai.vn/wp-content/uploads/2017/07/hot.gif)
![](https://blog.hocmai.vn/wp-content/uploads/2017/07/hot.gif)
[TEX]\left{2Y+y=1\\3x^2-y^2+xy+2x-3y+14=0[/TEX]
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