\documentclass[12pt]{article} \begin{document} \begin{tabular}{lcc} \hline & $f(t)=\mathcal{L}^{-1}\{F(s)\}$ & $F(s)=\mathcal{L}\{f(t)\}$ & Notes \\ \hline 1. 1 & $\frac{1}{s}, \quad s>0$ & Sec. 6.1; Ex. 4 \\ 2. $e^{a t}$ & $\frac{1}{s-a},$, & $s>a$ & Sec. 6.1; Ex. 5 \\ 3. $t^{n}, \quad n=$ positive integer & $\frac{n !}{s^{n+1}}, \quad s>0$ & Sec. 6.1; Prob. 31 \\ 4. $t^{p}, \quad p>-1$ & $\frac{\Gamma(p+1)}{s^{p+1}},$, & $s>0$ & Sec. 6.1; Prob. 31 \\ \end{tabular} \end{document}