5x^2y-3xy^2+4xy-14xy^2+4xy-2x^2y（化简）

5x^2y-3xy^2+4xy-14xy^2+4xy-2x^2y（化简） 化简：3x^2-[5xy-(x^y-3xy)+4x^2y-8xy] x^3y(-4y)^2+(-7xy)^2*(-xy)-5xy^3*(-3x)^2 5x^3y*(-3y)^2+(-6xy)^2*(-xy)+xy^3*(-4x^2) (-3xy+2xy)-(4xy+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 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 -3(xy-2x²)-[y²-(5xy-4x²)+2xy] 2x²y-3(2xy-xy)-xy 5xy²-{2x²y-[3xy²-(4xy²-2xy²)]}= （-3x^y+2xy)-( )=4x^+xy 已知x-y=3xy,求5x+2xy-5y/x-4xy-y的值 诺x+y=6,xy=4 求(5x-4y-3xy)-(8x-y+2xy) 因式分解 x-xy+3y-3x 2x+xy-y-4x+5y-6 (x^2+2xy+y^2-4xy)*(x^2-2xy+y^2+4xy) (-2xy+2x+5y)-(3xy+2y-2x)-(x+4y+xy)其中x-y=4xy=-1