XY(XY+3)+(XY+4)+4(X+Y+1)-(X+Y+2)
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XY(XY+3)+(XY+4)+4(X+Y+1)-(X+Y+2)XY(XY+3)+(XY+4)+4(X+Y+1)-(X+Y+2)XY(XY+3)+(XY+4)+4(X+Y+1)-(X+Y+2)XY(X
XY(XY+3)+(XY+4)+4(X+Y+1)-(X+Y+2)
XY(XY+3)+(XY+4)+4(X+Y+1)-(X+Y+2)
XY(XY+3)+(XY+4)+4(X+Y+1)-(X+Y+2)
XY(XY+3)+(XY+4)+4(X+Y+1)-(X+Y+2)
=x^2y^2+3xy+xy+4+4x+4y+4-x-y-2
=x^2y^2+4xy+3x+3y+6
(-3xy+2xy)-(4xy+xy)
xy^5-xy^4+xy-x因式分解
3xy-4xy-（-2xy）
4xy+6xy-3xy=?
3xy-4xy-（-2xy）
.(3xy²)²+(-4xy³)(-xy) (3xy²)²+(-4xy³)(-xy)
xy-2{xy-[3x^2y-(4xy^2+0.5xy)]+4x^2y}+6xy^2
（X-3xy+4xy-y）-[-2x-2（xy-3/2xy）-y]+6xy的过程
（-3x^y+2xy)-( )=4x^+xy
4(x²+xy-6)-3(2x²-xy)
-3(2x^2-xy)+4(x^2+xy-6)
-3(2x²-xy)+4(x²+xy-6)
化简4xy-y-xy+x
化简：3x^2-[5xy-(x^y-3xy)+4x^2y-8xy]
【x(xy-xy)-y(x-xy)】÷3xy
一道数学题(3x^2y-4xy^2)/xy
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