3a^3b-6a^2b-45ab; a^6b-a^2b^5; 256x^4y^6-81y^2z^43a^3b-6a^2b-45ab;a^6b-a^2b^5;256x^4y^6-81y^2z^4;

3a^3b-6a^2b-45ab; a^6b-a^2b^5; 256x^4y^6-81y^2z^43a^3b-6a^2b-45ab;a^6b-a^2b^5;256x^4y^6-81y^2z^4;
3a^3b-6a^2b-45ab; a^6b-a^2b^5; 256x^4y^6-81y^2z^4
3a^3b-6a^2b-45ab;
a^6b-a^2b^5;
256x^4y^6-81y^2z^4;

3a^3b-6a^2b-45ab; a^6b-a^2b^5; 256x^4y^6-81y^2z^43a^3b-6a^2b-45ab;a^6b-a^2b^5;256x^4y^6-81y^2z^4;
3a^3b-6a^2b-45ab;
=3ab（a^2-2a-15)=3ab(a-5)(a+3)
a^6b-a^2b^5;
=a^2b(a^4-b^4)=a^2b(a-b)(a+b)(a^2+b^2)
256x^4y^6-81y^2z^4;
=y^2(256x^4y^4-81z^4)
=y^2(16x^2y^2-9z^2)(16x^2y^2+9z^2)
=y^2(4xy-3z)(4xy+3z)(16x^2y^2+9z^2)