This isn't really a homework problem, as the entire solution is laid out in the text. My question is in regards to a possible typo, which I have highlighted in blue in the given picture.
Usually I don't like to second guess the text, but this one has been absolutely plagued by typos and I usually have to go to the professor to see if it really is a typo or if I missed something.
The Attempt at a Solution
My solution is ##h'(x) = (2x+1)^4(3x-2)^6(72x+1)##