\documentclass[12pt]{article} \usepackage{amssymb,amsmath,amscd,concmath,amsfonts} \usepackage{color} \pagestyle{empty} \begin{document} \begin{equation*}z = x - x_e \qquad v = u - u_e \qquad w = y - h(x_e, u_e)\end{equation*} \end{document}