How do you simplify e^6e^-6?

${e}^{6} {e}^{-} 6 = \textcolor{g r e e n}{1}$
color(red)(e^-6)==color(red)(1/(e^6)
So $\textcolor{b l u e}{{e}^{6}} \textcolor{red}{{e}^{-} 6} = \frac{\cancel{\textcolor{b l u e}{{e}^{6}}}}{\cancel{\textcolor{red}{{e}^{6}}}} = 1$