化简3x^2y-[2xy^2-2（xy-3/2x^2y）+xy]+3xy^2
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化简3x^2y-[2xy^2-2（xy-3/2x^2y）+xy]+3xy^2化简3x^2y-[2xy^2-2（xy-3/2x^2y）+xy]+3xy^2化简3x^2y-[2xy^2-2（xy-3/2x
化简3x^2y-[2xy^2-2（xy-3/2x^2y）+xy]+3xy^2
化简3x^2y-[2xy^2-2（xy-3/2x^2y）+xy]+3xy^2
化简3x^2y-[2xy^2-2（xy-3/2x^2y）+xy]+3xy^2
3x^2y-[2xy^2-2（xy-3/2x^2y）+xy]+3xy^2
=3x^2y-[2xy^2-2xy+3x^2y+xy]+3xy^2
=3x^2y-[2xy^2-xy+3x^2y]+3xy^2
=3x^2y-2xy^2+xy-3x^2y+3xy^2
=3x^2y-3x^2y+3xy^2-2xy^2+xy
=xy^2+xy
2x²y-3(2xy-xy)-xy
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化简(3x^2-5xy)+{-x^2-[-3xy+2(x^2-xy)+y^2]}
化简3x^2y-[2xy^2-2（xy-3/2x^2y）+xy]+3xy^2
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