Multiply and simplify: (3a-12/16-a^2*2a^2+3a+1/6a+3)

What is the product? maybe a stupid question but both questions get the same answer right? if so what is it and pls show work....need answer asap!!!!

[(3a - 12)/(16 - a^2)] [(2a^2 + 3a + 1) / (6a + 3)]

{3(a-4)/[(4+a)(4-a)]} {(2a+1)(a+1)/[3(2a+1)]}

[-1/(a+4)] (a+1) = -(a+1)/(a+4) (Answer)