1/2(x²-y)+1/3(x-y²)+1/6(x²+y²)＝?

来源：学生作业学帮网 编辑：学帮网 时间：2024/07/02 11:55:10

1/2(x²-y)+1/3(x-y²)+1/6(x²+y²)＝?