化簡: (1)(a-b)(a+b)3-2ab(a2-b2) (2)(a+b)(a2-ab+b2)-(a+b)3 (3)(a+4b-3c)2 (4)(a+4b-3c)(a-4b-3c)
化簡:
(1)(a-b)(a b)3-2ab(a2-b2)
(2)(a b)(a2-ab b2)-(a b)3
(3)(a 4b-3c)2
(4)(a 4b-3c)(a-4b-3c)
(1)(a-b)(a b)3-2ab(a2-b2)
(2)(a b)(a2-ab b2)-(a b)3
(3)(a 4b-3c)2
(4)(a 4b-3c)(a-4b-3c)
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