-(-4xy^2)^3*(-y^3)^5

x^3y(-4y)^2+(-7xy)^2*(-xy)-5xy^3*(-3x)^2 5xy^2-[3xy^2-(4xy^2-2x^y)]+x^2y-xy^2如何化简 -3(xy-2x²)-[y²-(5xy-4x²)+2xy] [-(x-y)^2/xy]^-4*(y^2-xy/x)^3*(x^4/y^10)÷(xy-y^2/x)^-5=-y(y- x+y=8,xy=-2,求(5xy+4x+7y)+(6x-3xy)-(4xy-3y)的值 (4x^2y-5xy^2)-(3x^3y-4xy^2) x*-2xy+3y*=9 4x*-5xy+6y*=30 已知x+y=5,xy=2,求5x+4y-3y-2y+xy的值 已知xy^2=-2,求-xy（x^2y^5-xy^3-y)的值. 已知xy^2=-2 求-xy(x^2y^5-xy^3-y) 已知x-y=4xy，则2x+3xy-2yx-2xy-y 先化简,再求值 ⒈2(Xy+Xy)-3(Xy-xy)-4Xy,其中X=1,y=-1