а)(10m-4)^2
б)(5m-2)^2
в)(3a-b)(3a+b)
г)(5c-7d)(5c+7d)
д)(a-4)(a+4)+a^2+8a
е)(a-c)^2-(a-2c)(a+2c)
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а)(10m-4)^2
б)(5m-2)^2
в)(3a-b)(3a+b)
г)(5c-7d)(5c+7d)
д)(a-4)(a+4)+a^2+8a
е)(a-c)^2-(a-2c)(a+2c)