(1):(-4(a-b))^2(b-a)^3
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(1):(-4(a-b))^2(b-a)^3
(1):
(-4(a-b))^2(b-a)^3
(1):(-4(a-b))^2(b-a)^3
[-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