Разложите по формуле (c^4-7)^2 (3a-b^3)^2 (4a^2-b)^2 (x^3-2)^2 (6x-2y)^2 (8b-9a)^2 (0.5a-30b)^2 (0.2x-0.6y)^2

1)= (c^4)^2-2*7*c^4+7^2=c^8-14c^4+49
2)=9a^2-6ab^3+b^6
3)=16a^4-8a^2*b+b^2
4)=x^6-4x^3+4
5)=36x^2-24xy+4y^2
6)=64b^2-144ab+81a^2
7)=0,25a^2-30ab+900b^2
8)=0,4x^2-0,16xy+0,36y^2