# Heklp with an integral involving the exp function

Hi everyone

I've been dealing with a rather difficult (at least for me) integration problem which I am not able to find in integration tables I've been consulting.
After a variable transformation I ended up with the following sets of integrals:

$$\\int$$ e$$^{y}$$/y$$^{2}$$dy from 0 to t (t is not infinity) and

$$\\int$$ e$$^{y}$$/y$$^{3}$$dy also from 0 to t and

(sorry I could not get the integral symbol to work, so I used int instead)

thanks
xnr