expressionExpression2008-02-22 05:48:102008-02-22 15:20:20Definitionsum expression\usepackage{amssymb}
\usepackage{amsmath}
\usepackage{amsfonts}
\usepackage{pstricks}
\usepackage{psfrag}
\usepackage{graphicx}
\usepackage{amsthm}
\usepackage{xypic}
An \emph{expression} is a symbol or \PMlinkescapetext{combination} of symbols used to denote a quantity or value. Expressions consist of constants, variables, operations, operators, functions, and parentheses.\\
\textbf{Note 1.} If an expression \PMlinkescapetext{contains} one or more operations to be performed in a certain \PMlinkname{order}{OrderOfOperations}, the expression may be named after the last (\PMlinkname{i.e.}{Ie} outermost) operation. For example, the expression $\displaystyle a^2-5\sqrt{a}+\frac{2}{3a}$ is a {\em sum expression}.\\
\textbf{Note 2.} An equation is a denoted equality of two expressions.
\begin{thebibliography}{9}
\bibitem{dict} \emph{Dictionary.com Unabridged} (version 1.1). Accessed on February 22, 2008. URL: \PMlinkexternal{http://dictionary.reference.com/browse/expression}{http://dictionary.reference.com/browse/expression}
\end{thebibliography}