1. The problem statement, all variables and given/known data I hope someone can help me with this integral. It is really an improper integral, but I cannot figure out how to do the indefinite integral on it: integral[e1/x/x3]. Any help would be appreciated, thanks. 2. Relevant equations ? 3. The attempt at a solution I tried integration by parts, substitution and using the table of integrals. I couldn't get any of them to work.