# Basic Integral Question

1. Homework Statement
Find the indefinite integral using substitution:
$$\int$$e^2x(1+e^2x)^3 dx
2. Homework Equations

3. The Attempt at a Solution
I'm not sure how to start. What do I substitute? Any suggestions to get me started will be greatly appreciated.

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put u=e^2x====>du=2e^2xdx

Dick
Homework Helper
Better to put u=(1+e^(2x)).

Better to put u=(1+e^(2x)).
Yes, thanks dick. Thats what I ended up doing. I had just learned this stuff today, so I think msa's approach may have been a bit over my head.