فارسی لاتک

به سایت Science Soft بروید و مثلا کد زیر را وارد کنید:

\documentclass{article}
\pagestyle{empty}
\usepackage[T1,LFE,LAE]{fontenc}
\usepackage[utf8]{inputenc}
\usepackage[farsi,arabic,english]{babel}
\TOCLanguage{farsi}

\makeatletter
%due to a bug in ARABI in which the command \textRL is not
%changed to write Farsi though the main TOC language is Farsi.
\def\textRL#1{{\expandafter\@farsi@R{#1}}}

%due to a bug in ARABI in which the quotaion marks are not
%assigned to their counterpart font-glyphs in lfeenc.def
\DeclareTextSymbol{\guillemotright}{LFE}{62}
\DeclareTextSymbol{\guillemotleft}{LFE}{60}
\makeatother

\begin{document}
\selectlanguage{farsi}
%a paragraph in Farsi
%to write a number use \I{NUMBER}
%to write some phrases in English use \textLR{English phrase}
$$\sum^{+ \infty}_{i=1} \frac{1}{i^2} = \frac{\pi^2}{6}$$

\end{document}