4a²b + 3ab² - 2b² + a³
按a的升幂排列得：
-2b² + 3ab² + 4a²b + a³
4a^2b+3ab^2-2b^2+a^3 按a的升幂排列为多少
4a^2b+3ab^2-2b^2+a^3 按a的升幂排列为多少
数学人气：741 ℃时间：2019-11-18 08:42:36
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