СРОЧНО(30 баллов!!!) Упростите:
б) (2а+b)(4a2+b2)(2a-b)
в) (c3+b)(c3-b)(c6+b2)
г) (3m-2)(3m+2)+4
д) 25n2-(7+5n)(7-5n)
е) 6x2-(x-0,5)(x+0,5)
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