+ Default value is \code{FALSE}.} \r
+ \item{math.style.exponents}{In a LaTeX table, if \code{TRUE} or\r
+ \code{"$$"}, then use \verb{$5 \times 10^{5}$} for 5e5. If\r
+ \code{"ensuremath"}, then use \verb{\\ensuremath{5 \times 10^{5}}}\r
+ for 5e5. If \code{"UTF-8"} or \code{"UTF-8"}, then use UTF-8 to\r
+ approximate the LaTeX typsetting for 5e5.\r