I'm not exactly familiar with how Anki processes the inline math expressions, but the developer advised me to ask this question on a Tex discussion platform:
The problem is that the rendered formulas are always placed a bit too high in the text. Like this:

How can I change this?
Edit:
All Anki does is combine the text on your card with the prefix and postfix in the deck options and send it to LaTeX, so if you're having layout problems you'll need to ask on a LaTeX forum.
The only related settings I could find are the LaTex header and footer:
Header:
\documentclass[12pt]{article}
\special{papersize=3in,5in}
\usepackage[utf8]{inputenc}
\usepackage{cancel}
\usepackage{amssymb,amsmath}
\pagestyle{empty}
\setlength{\parindent}{0in}
\begin{document}
\scriptsize
Footer:
\end{document}
dvipng, and even the documentation example shows the alignment you present. As such, I don't think this has anything to do with (La)TeX. It is perhaps the browsers default to insert images at the baseline the surrounding browser text. – Werner Dec 14 '11 at 0:13[latex]$\sum_{n=0}^\infty a_n\cdot x^n$ \sf mit dem...[/latex]– Mark S. Everitt Dec 15 '11 at 4:01