Разложите на множители 1.64-b^2 2.35a^2+10ax+x^2 3.49x^2y^2 -36 a^4 4.64y^2 -(a+3)^2 5? 64m^12-1

1.64-b^2=(8-b)(8+b)
2.25a^2+10ax+x^2=(5a+x)²
3.49x^2y^2 -36 a^4=(7xy-6a²)(7xy+6a²)
4.64y^2 -(a+3)^2=(8y-a-3)(8y+a+3)
5.64m^12-1=(8m^6-1)(8m^6+1)