Question

计算：5/12[-4/3(x-y)的三次方](x+y）的平方（-x-y）的三次方（y-x）的二次方

Answer 1

5/12[-4/3(x-y)的三次方](x+y）的平方（-x-y）的三次方（y-x）的二次方＝(-5/9)×(x-y)³×(x+y)²×[-(x+y)³]×(x-y)²＝(5/9)×(x-y)的5次方×(x+y)的5次方＝(5/9)×(x²-y²)的5次方...