xy-2{xy-[3x^2y-(4xy^2+0.5xy)]+4x^2y}+6xy^2
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xy-2{xy-[3x^2y-(4xy^2+0.5xy)]+4x^2y}+6xy^2xy-2{xy-[3x^2y-(4xy^2+0.5xy)]+4x^2y}+6xy^2xy-2{xy-[3x^2y-(
xy-2{xy-[3x^2y-(4xy^2+0.5xy)]+4x^2y}+6xy^2
xy-2{xy-[3x^2y-(4xy^2+0.5xy)]+4x^2y}+6xy^2
xy-2{xy-[3x^2y-(4xy^2+0.5xy)]+4x^2y}+6xy^2
xy-2{xy-[3x^2y-(4xy^2+0.5xy)]+4x^2y}+6xy^2
=xy-2xy+2[3x^2y-(4xy^2+0.5xy)]-8x^2y+6xy^2
=-xy+6x^2y-2(4xy^2+0.5xy)-8x^2y+6xy^2
=-xy-2x^2y-8xy^2-xy+6xy^2
=-2xy-2x^2y-2xy^2
(-3xy+2xy)-(4xy+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
2x²y-3(2xy-xy)-xy
（-3x^y+2xy)-( )=4x^+xy
化简：3x^2-[5xy-(x^y-3xy)+4x^2y-8xy]
(x^2+2xy+y^2-4xy)*(x^2-2xy+y^2+4xy)
x^3y(-4y)^2+(-7xy)^2*(-xy)-5xy^3*(-3x)^2
5x^3y*(-3y)^2+(-6xy)^2*(-xy)+xy^3*(-4x^2)
3(x^2y+xy)-4(xy-2x^2y)-(-xy)
当x-y=2xy时,求4x-3xy-4y/xy
XY(XY+3)+(XY+4)+4(X+Y+1)-(X+Y+2)
3（x平方y+xy)-4(xy-2x平方y)-(xy)
一道数学题(3x^2y-4xy^2)/xy
计算：5xy^2-[3xy^2-(4xy^2-2x^2y)]+2x^2y-xy^2
5xy^2-(3xy^2-(4xy^2-2x^2y))+2x^2y-xy^2求
5x^2y-3xy^2+4xy-14xy^2+4xy-2x^2y（化简）
-3(xy-2x²)-[y²-(5xy-4x²)+2xy]