So I found the complex version of the fourier series of e^x.

$\displaystyle \sum_{n=-\infty}^{\infty}(-1)^n(\frac{l+in\pi}{l^2+n^2{\pi}^2})(sinh(l))e^{\f rac{in{\pi}x}{l}}$

I was wondering if there is a way to convert this to the real full fourier series form.

Thanks