1.2a(a-3)^2-6a^2(3-a)+8a(a-3)=(a-3)(2a(a-3)+6a^2+8a)=(a-3)(2a^2-6a+6a^2+8a)=(a-3)(8a^2+2a)=2a(a-3)(4a+1)2.24xy^2z^2(x+y-z)-32xyz(z-x-y)+8xyz^3(z-x-y)=24xy^2z^2(x+y-z)+32xyz(x+y-z)-8xyz^3(x+y-z)=8xyz(x...