Even with such a simple test as this:

\documentclass[10pt,a4paper]{article} \usepackage[utf8x]{inputenc} \usepackage{ucs} \usepackage{amsmath} \usepackage{amsfonts} \usepackage{amssymb} \begin{document} \begin{equation} α = sin^{-1} \frac{1}{q} \end{equation} \end{document}