-one&two&\mbox{three}&\mbox{four}&\mbox{five}\\
-He&2& 2.77234 & 45672. & 0.69 \\
-C\footnote{Some tables require footnotes.}
-&C\footnote{Some tables need more than one footnote.}
-& 12537.64 & 37.66345 & 86.37 \\
+one & two & \multicolumn{2}{c}{three} & \multicolumn{2}{c}{four} & \multicolumn{2}{c}{five}\tabularnewline
+He & 2 & 2&77234 & 45672& & 0&69 \tabularnewline
+C & C & 12537&64 & 37&66345 & 86&37 \tabularnewline