化简:-3{y-(3x^2-3xy)}-{y+2(4x^2-4xy)}版本

化简：3x^2-[5xy-(x^y-3xy)+4x^2y-8xy] 化简2(x²y+xy)-3(x²y-xy)-4x²y 化简：x-y/x+3y÷x^-y^2/x^2+6xy+9y^2-(xy/x+y) 化简(3x^2-5xy)+{-x^2-[-3xy+2(x^2-xy)+y^2]} 化简：2x²y+{2xy-[3x²y-2(-3x²y+2xy)]-4xy}化简：2x²y+{2xy-[3x²y-2(-3x²y+2xy)]-4xy} 2x²y-3(2xy-xy)-xy 化简3x^2y-[2xy^2-2（xy-3/2x^2y）+xy]+3xy^2 化简!1、（x^2-xy）+xy+y^2 2、3（x^2-xy）-xy+y^2 5x^2y-3xy^2+4xy-14xy^2+4xy-2x^2y（化简） 【x(xy-xy)-y(x-xy)】÷3xy -x-3xy+y x^2-xy-6y^2+3xy+y+2 因式分解:12xy^2(y-x)+xy^3(x-y)+4x^2y(x-y) X^Y-2XY^2+y^3 化简4xy-3y²-3x²+xy-3xy-2x²+x²-2y² （X-3xy+4xy-y）-[-2x-2（xy-3/2xy）-y]+6xy的过程 xy-2{xy-[3x^2y-(4xy^2+0.5xy)]+4x^2y}+6xy^2 计算：3xy[2xy-x（y-2）+x]