化简:xy+5x/y^2+10y+25
[-(x-y)^2/xy]^-4*(y^2-xy/x)^3*(x^4/y^10)÷(xy-y^2/x)^-5=-y(y-
已知x^2+10xy+25y^2-1=0,化简x^3+5x^2y+x^2..
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(3X²-XY+Y²)-5(X²-XY+2Y²)
化简:x-y/x+3y÷x^-y^2/x^2+6xy+9y^2-(xy/x+y)
化简:根号(4y^5)-(4xy^4)+(x^2y^3)(y>1/2x)
[(xy+2)(xy-2)-2x^2y^2+4]/xy,其中x=10,y=-1/25
[(xy+2)(xy-2)-2x^2y^2+4]/(xy),其中:x=10,y=-1/25
先化简,再求值:[-xy/(x-y)^2]^4*(x^2-xy/x)3*x^4/y^10÷(x/xy-y^2)^5
化简(x平方-y平方)/(x+y)+(x平方-2xy+y平方)/(x-y)
x^3y(-4y)^2+(-7xy)^2*(-xy)-5xy^3*(-3x)^2