Math Help - Integral problems

1. Integral problems

I have two integral problems:
$\int \frac{x}{x^2+3} e^{tx} dx$
$\int arctan(\frac{x}{\sqrt{3}}) e^{tx} dx$

2. Re: Integral problems

Neither of these have closed form solutions and both require knowledge of the Exponential Integral \displaystyle \begin{align*} \textrm{Ei}\,(x) \end{align*}.