Ответ:

1 (x-1)(x²+x+1)

2 (3+a)(9-3a+a²)

3 (6-y)(64+6y+y²)

4(0,5a+b) (0,25a²-0,5ab+b²)

5(a²-2)(a⁴+2a²+4)

6 (ab-c) (a²b²+abc+c²)