Operators

\documentclass{article}

\title{Operators}
\author{VK}
\date{\today}

\begin{document}

\maketitle

\begin{itemize}
	\item $a+b$
    \item $a-b$
    \item $-a$
    \item $a\cdot b$
    \item $a\times b$
    \item $a/b$
    \item ${a\over b}$
    \item $\frac{a}{b}$
\end{itemize}

\end{document}