(2x-y)的十三次方除以【(2x-y)的三次方】的二次方除以【(y-2x)的二次方】的三次方
=(2x-y)的十三次方除以(2x-y)的6次方】除以(2x-y)的6次方
=(2x-y)的7次方除以(2x-y)的6次方
=2x-y
=2*2-1
=4-1
=3
(2x-y)的十三次方除以【(2x-y)的三次方】的二次方除以【(y-2x)的二次方】的三次方
=(2x-y)的十三次方除以(2x-y)的6次方】除以(2x-y)的6次方
=(2x-y)的7次方除以(2x-y)的6次方
=2x-y
=2*2-1
=4-1
=3