Ответ:\(a^3+64=a^3+4^3=(a+4)(a^2-4a+16)\);\(8x^3-y^3=(2x)^3-y^3=(2x-y)(4x^2+2xy+y^2)\);\(216-m^3n^3=6^3-(mn)^3=(6-mn)(36+6mn+m^2n^2)\);\(b^9+a^{12}=(b^3)^3+(a^4)^3=(b^3+a^4)(b^6-a^4b^3+a^8)\).