1. ## integration

$\int\frac{x}{(2x+1)^4} dx$

2. Originally Posted by Punch
$\int\frac{x}{2x+1}^4 dx$
that power 4 is where ?

3. edited.. sorry for that mistake

4. Substitute $u=2x+1$ so that $dx = \frac{du}{2}$

5. Let $u=2x+1$ and then $\displaystyle x=\frac{u-1}{2}~\&~dx=\frac{du}{2}$.