140. Разложите на множители:
1) \( m^3 - n^3 = (m - n)(m^2 + mn + n^2) \)
2) \( c^3 + 8 = (c + 2)(c^2 - 2c + 4) \)
3) \( 27a^3 - b^3 = (3a - b)(9a^2 + 3ab + b^2) \)
4) \( 125 + a^3b^3 = (5 + ab)(25 - 5ab + a^2b^2) \)
5) \( x^6 - y^9 = (x^2 - y^3)(x^4 + x^2y^3 + y^6) \)
6) \( 1000a^{12}b^3 + 0.001c^9d^{15} = (10a^4b + 0.1c^3d^5)(100a^8b^2 - a^4bc^3d^5 + 0.01c^6d^{10}) \)