化简整式-3中括号y-(3x²-3xy)中括号-中括号y+2(4x²-4xy)中括号3x²y-中括号2xy²-4(二分之一xy-四分之三x²y)+xy中括号13xy²-3[y-(3x²-3xy)]-[y+2(4x²-4xy)]3x²y-[2xy

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化简整式-3中括号y-(3x²-3xy)中括号-中括号y+2(4x²-4xy)中括号3x²y-中括号2xy²-4(二分之一xy-四分之三x²y)+xy

化简整式-3中括号y-(3x²-3xy)中括号-中括号y+2(4x²-4xy)中括号3x²y-中括号2xy²-4(二分之一xy-四分之三x²y)+xy中括号13xy²-3[y-(3x²-3xy)]-[y+2(4x²-4xy)]3x²y-[2xy
化简整式
-3中括号y-(3x²-3xy)中括号-中括号y+2(4x²-4xy)中括号
3x²y-中括号2xy²-4(二分之一xy-四分之三x²y)+xy中括号13xy²
-3[y-(3x²-3xy)]-[y+2(4x²-4xy)]
3x²y-[2xy²-4(二分之一xy-四分之三x²y)+xy]13xy²

化简整式-3中括号y-(3x²-3xy)中括号-中括号y+2(4x²-4xy)中括号3x²y-中括号2xy²-4(二分之一xy-四分之三x²y)+xy中括号13xy²-3[y-(3x²-3xy)]-[y+2(4x²-4xy)]3x²y-[2xy
1、-3[y-(3x^2-3xy) ]-[y+2(4x^2-4xy) ]=-3y+8x^2+9xy-y-8x^2+8xy=17xy-4y
2、3x^2 y-[2xy^2-4(1/2 xy-3/4 x^2 y)+xy]13xy^2==3x^2 y-[2xy^2-2xy+3x^2 y+xy]13xy^2=3x^2 y-26x^2 y^4+13x^2 y^3-39x^3 y^3
备注:第二题13xy²前面应该少了一个符号!您可以再追问~

朋友,截个图吧,这个怎么解啊