3x^2y-[2xy^2-2(xy-3⼀2x^2y)+xy]+3xy^2,X=3y=-1⼀3(化筒

3x^2y-[2xy^2-2(xy-3/2x^2y)+xy]+3xy^2,X=3y=-1/3(化筒求植,要有过程)
2025-05-10 02:00:41
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