The problem is:
$\int\frac{7x}{(2x+5)^2}\;.$
I got and am fairly confident in:
$\frac74 \ln|2x+5| + \frac{35}{8x + 20}$
However this is apparently not the correct answer. Im not being graded on this and it is not a homework problem for me. Does anyone get a different answer than I did or is the key incorrect?
Thanks for the responses. I'm convinced my friend entered it into the computer wrong. According to her the constant was supposed to be ommitted, so either she entered it wrong or her professor did.