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x²×(-xy³)×y²-x³×y³×(-y)²
人气:107 ℃ 时间:2019-09-22 03:36:38
解答
x²×(-xy³)×y²-x³×y³×(-y)²
= -x^3y^5-x^3y^5
= -2x^3y^5
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