-4x²y-8xy²+2x²y-3xy²

-4x²y-8xy²+2x²y-3xy² 3x²y+xy²-[2xy²-4x²y+（x²y-2xy²） (2x²y-3xy²)-3(x²y-2xy²)+2（x²y-4xy&# 计算：(xy-x²)×x-y/xy -3(xy-2x²)-[y²-(5xy-4x²)+2xy] 计算 2xy[4x²y²-3y（xy+x²y）-xy²] 化简4xy-3y²-3x²+xy-3xy-2x²+x²-2y² x²/xy-x/y x-y/x²÷x²-2xy+y²/xy*（xy-x²） 计算：x²+2xy+y²/xy-y².x²-2xy+y²/xy+y&# 先化简,再求值:{xy(x²-3y)+3xy²}(-2xy)+x³y²(2x-y -2xy-4x²y+8三次方y