(X-Y)²(X-Y)(Y-X)³ =(X-Y)³ (Y-X)³ ( (Y-X)³= -(X-Y)(X-Y)²)=-(X-Y)(X-Y)²(X-Y)³=-(X-Y)^6望采纳
(X-Y)²(X-Y)(Y-X)³=-(x-y)^6
