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 May 27 awarded Popular Question Mar 20 awarded Tumbleweed Mar 14 awarded Editor Mar 24 awarded Peer Pressure Mar 22 awarded Custodian Mar 22 awarded Scholar Apr 8 comment Integral evaluation taking too long $$\int_0^t |1-e^{-bs}|ds + \int_t^{\infty}e^{-bs}ds$$ and this is equal to $t+ \frac{2}{b}e^{-bt}- \frac{1}{b}$ that is, integral is convergent. It is a pretty simple integral actually, i am just incapable of doing this with mathematica, and i have to do it with mathematica for the next step, which is impossible to do by hand. Apr 8 comment Integral evaluation taking too long well, thank you for your response, but i evaluated the integral by hand too, and there is no problem, it is convergent. I am trying to find out what is wrong with the mathematica code. I am correcting e -> E, however, i am not following your comment on heavisidetheta Apr 8 asked Integral evaluation taking too long Mar 15 awarded Commentator Mar 14 comment integration on real domain only! thank you so much, I've just started using mathematica, I greatly appreciate your help. Mar 14 comment integration on real domain only! {Element[{b, c, d}, Reals], a > 0} why dont we just write Element{a,b,c,d}, Reals ? Mar 14 comment integration on real domain only! nothing changes though! Mar 14 comment integration on real domain only! Thank you very much for your response. Mar 14 asked integration on real domain only!