作业帮1/2(x²-y)+1/3(x-y²)+1/6(x²+y²)＝?
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1/2(x²-y)+1/3(x-y²)+1/6(x²+y²)＝?
1/2(x²-y)+1/3(x-y²)+1/6(x²+y²)＝?
1/2(x²-y)+1/3(x-y²)+1/6(x²+y²)＝?
