化简：3x^2-[5xy-(x^y-3xy)+4x^2y-8xy]

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]} 因式分解 x-xy+3y-3x 2x+xy-y-4x+5y-6 化简：x-y/x+3y÷x^-y^2/x^2+6xy+9y^2-(xy/x+y) 5x^2y-3xy^2+4xy-14xy^2+4xy-2x^2y（化简） 化简3（x²y+xy)-4(x²y-xy)-5x²y, 化简2(x²y+xy)-3(x²y-xy)-4x²y x^3-2x^2y+xy^2-x因式分解 (x^2-x-3)(x^2-x-5)-3x^3-2x^2y+xy^2-x 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) 因式分解:12xy^2(y-x)+xy^3(x-y)+4x^2y(x-y) -x^5y-xy+2x^3y -x-3xy+y (x-2xy)*(-xy+2y*y)-(3x*x-2xy)(x-9xy+6y*y)答案应为-2x-x*x-3x， x^3y(-4y)^2+(-7xy)^2*(-xy)-5xy^3*(-3x)^2 5x^3y*(-3y)^2+(-6xy)^2*(-xy)+xy^3*(-4x^2) 3xy-( )=5xy-2 x-(5x-3y)+( )=-2x+2y