(xy^2-2xy+x)乘以y^3-y分之y^3+y^2
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(xy^2-2xy+x)乘以y^3-y分之y^3+y^2(xy^2-2xy+x)乘以y^3-y分之y^3+y^2(xy^2-2xy+x)乘以y^3-y分之y^3+y^2(xy^2-2xy+x)乘以(y
(xy^2-2xy+x)乘以y^3-y分之y^3+y^2
(xy^2-2xy+x)乘以y^3-y分之y^3+y^2
(xy^2-2xy+x)乘以y^3-y分之y^3+y^2
(xy^2-2xy+x)乘以(y^3-y)分之(y^3+y^2)
=x(y^2-2y+1)*[y^2(y+1)]/[y^2(y-1)]
=x(y-1)^2*[y^2(y+1)]/[y^2(y-1)]
=x(y-1)(y+1)
(xy^2-2xy+x)乘以y^3-y分之y^3+y^2
3xy乘以[6 xy-3(xy-1/2x的平方y)]
(x/y)^2乘以(xy)^-2除以(x^-1y)
计算（2X的平方Y-XY）乘以3XY等于多少
2x²y-3(2xy-xy)-xy
XY（XY-X2)乘以------------X-Y
1/5x的平方y乘以(-5xy)平方-(-2x)立方乘以xy立方
x^2y-x^3/x^2+2xy+y^2÷x/x-y乘以x+y/x^2-2xy+y^2
(X-3Y)乘以(-3XY)=
（xy-x^2)乘以(xy)/(x-y)= x(y-x)乘以（xy）/(x-y)= -x(x-y)乘以（xy）/(x-y)= -x^2y这样做对吗?
（xy-x²）除以xy分之x²-2xy+y²乘以x²分之x-y
7x^2y-[xy+4(xy^2+1/8xy)-3x^2y]答对给分
x^2-xy-6y^2+3xy+y+2
(3X平方+7XY+2Y平方)乘以(X-2Y)等于
xy-2{xy-[3x^2y-(4xy^2+0.5xy)]+4x^2y}+6xy^2
X^Y-2XY^2+y^3
（X-3xy+4xy-y）-[-2x-2（xy-3/2xy）-y]+6xy的过程
已知x=y=11,求(xy-1)的平方+（x+y-2)乘以(x+y-2xy)