(1):
问题描述：
(1):
（-4（a-b）)^2(b-a)^3
答
[-4(a-b)]^2(b-a)^3
=[-4(a-b)]^2×[-(a-b)^3]
=16(a-b)²×[-(a-b)³]
=-16(a-b)^5