\name{composite-math}
\title{Several mathematical forms}
\description{
The scalar \eqn{x^2} and the longer \eqn{a+b}{a plus b} are useful.
The display form is \deqn{\sum_i x_i}{sum of x sub i}.
\tabular{ll}{
Symbol \tab Meaning \cr
x \tab input
}
}
\references{A reference for the notation.}