Has anyone found out how you’re supposed to submit the answer for #2? I’ve tried both simplified and non-simplified versions (and with the help of the math lab tutor) and can’t get it to accept my answer. My problem was:

Let F(x)=(4x^2+8x-7)ln(3x+7), find F’(x)

and I got F’(x) = (8x+2)ln(-2x-9)+(4x^2+2x+9)(2/2x+9) which was marked wrong,

and F’(x)=(8x+2)ln(-2x-9)+8x^2+4x+18/2x+9 which was also marked wrong.