Hi everyone,

I am trying to integrate the following expression:

$\displaystyle \int$$\displaystyle \frac{2}{u}$$\displaystyle \mathrm{d}x$

(where "u" is it should read "$\displaystyle e^{2x}$$\displaystyle +4$" but I couldn't get the LaTex maths thing to work, sorry)

using the given substitution $\displaystyle u =$ $\displaystyle e^{2x}$$\displaystyle +4$

Please can anyone offer a way to do this? I get to the stage where I have:

$\displaystyle \int$$\displaystyle \frac{1}{a}$$\displaystyle du$

(where "a" is it should read "u(u-4)")

but I can't get any further. Any help would be much appreciated.