(x-y)²(x-y)³(y-x)²(y-x)³=(x-y)的五次方(y-x)的五次方=(x-y)的五次方[-(x-y)的五次方]=-(x-y)的十次方
x-y)²(x-y)³(y-x)²(y-x)³=(x-y)的五次方(y-x)的五次方=(x-y)的五次方[-(x-y)的五次方]=-(x-y)的十次方
