作业帮-3(xy-2x²)-[y²-(5xy-4x²)+2xy]
来源：学生作业帮助网 编辑：作业帮 时间：2024/10/01 21:48:48
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-3(xy-2x²)-[y²-(5xy-4x²)+2xy]
-3(xy-2x²)-[y²-(5xy-4x²)+2xy]
-3(xy-2x²)-[y²-(5xy-4x²)+2xy]