五种军人迷彩服:一道数学 不是应用题 很急用
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去括号,合并同类项
(x^3-3x^2y+3xy^2)-(x^3-3x^2y-3xy^2-y^3)
(x^3-3x^2y+3xy^2)-(x^3-3x^2y-3xy^2-y^3)
6x^2y+y^3
6x^2y+y^3
6x^2y+y^3
6x^2y+y^3
6x^2y+y^3
6x^2y+y^3
6x^2y+y^3
6x^2y+y^3