\documentclass[12pt,a4paper]{article}
\usepackage[latin1]{inputenc}
\begin{document}
\section{Emacs package X-Symbol}
\includegraphics{xsymb.eps}
``Czytasz w\l a\'snie krótki podr\k ecznik\ldots'' (Latin-2)
$\lsemantics b_1 \land b_2 \rsemantics_B \triangleq conj_\setB(\lsemantics b_1 \rsemantics_B, \lsemantics b_2 \rsemantics_B)$ % b_1
\end{document}