\documentclass[12pt]{article}
\usepackage{amssymb,amsmath,amscd,concmath,amsfonts}
\usepackage{color}
\pagestyle{empty}
\begin{document}
\begin{equation*}
    y(t) = \frac{a v_0}{b} + \frac{v_0^2 t}{b}.
\end{equation*}
\end{document}