(1)4a^3-(4a^3b^2) =4a^3(1-b^2)=4a^2(1+b(1-b)(2)9x^2y^3-12xy^4+15xy^5 =3xy^3(3x-4y+5y^2)(3)4(x-y)^3+(y^2)(y-x)^3 =4(x-y)^3-y^2(x-y)^3 =(x-y)^3(4-y^2)=(x-y)^3(2-y)(2+y)(4)(a+b)(a-b)-2b(3a-5b) =a^2-b^2-6...