化简:5x-y-2(xy)

化简：3x^2-[5xy-(x^y-3xy)+4x^2y-8xy] 化简(3x^2-5xy)+{-x^2-[-3xy+2(x^2-xy)+y^2]} 5x^2y-3xy^2+4xy-14xy^2+4xy-2x^2y（化简） 化简(X-5)*(Y+2)=XY 化简:5x-y-2(xy) 化简x^-y^/x^-2xy+y^ (-2x)²×（xy+y²）-5x（x-y)×xy化简. 化简:-(x^2-2xy-y^2)+(5x^2-2xy-3y^2) 化简 -(x^2-2xy-y^2)+(5x^2-2xy-3y^2) 化简-(x方-2xy-y方)+(5x方-2xy-3y方) 化简4xy+(-2y²+3xy+x²)-(-5xy+x²+y²） 化简：xy+5x/y^2+10y+25 x^2y-2xy+y化简 ((xy+2)(xy-2)-2x²y²+5(xy-y)²)÷(2xy) -(x2²-2xy-y²)+(5x²-2xy-3y²)化简 化简(5x×2y+5xy-7x)-(4x×2y+5xy-7x)的结果 因式分解 x-xy+3y-3x 2x+xy-y-4x+5y-6 x^3y(-4y)^2+(-7xy)^2*(-xy)-5xy^3*(-3x)^2