Ответ:
1) -11а²+3а+36
2) -26а²+23а+9
3) 2а×(12+а²)
4) 2(3а²+1)
5) 7к²-44к-4
6) -4к²-12к-28
7) 5х²+12х
(а+1)³-(а-1)³ = а³+2а+1³-а³-2а+1³ = 2
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Ответ:
1) -11а²+3а+36
2) -26а²+23а+9
3) 2а×(12+а²)
4) 2(3а²+1)
5) 7к²-44к-4
6) -4к²-12к-28
7) 5х²+12х
(а+1)³-(а-1)³ = а³+2а+1³-а³-2а+1³ = 2