(а-3)(а+3)
(2а - 7b)(2a + 7b)
(11a - 15b)(11a + 15b)
(13c^3 - 20 m) ( 13c^3 + 20m)
а ( 4а - 4b^2)
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(а-3)(а+3)
(2а - 7b)(2a + 7b)
(11a - 15b)(11a + 15b)
(13c^3 - 20 m) ( 13c^3 + 20m)
а ( 4а - 4b^2)
2: (2a-7b)(2a+7b)
3: (11a-15b)(11a+15b)
4: (13c³-20m)(13c³+20m)
5: (2a-2ab)(2a+2ab)
вроде так.