Consider the integral:
My Nspire CAS tells me that the answer to this is $ln\left((x+1)^3 \cdot (2x+3)\right)$
(replace parentheses with absolute value signs, I don't know how to make those in tex).
This is not the correct answer according to my calculations and Wolfram Alpha http://www.wolframalpha.com/input/?i=integrate+%288x%2B11%29%2F%28%282x%2B3%29%28x%2B1%29%29
Any ideas what's going on?