\begin{center}
\footnotesize
\setlength{\mylength}{\baselineskip}
\begin{longtable}{rp{0ex}p{9cm}p{0ex}RL}
\caption{Laurent polynomials and selected mutations for bucket 130.}\\

\toprule \multicolumn{1}{c}{{Node}}&& \multicolumn{1}{c}{{Laurent polynomial}} && \multicolumn{2}{c}{{Mutations from Figure~\ref{fig:130a}}} \\ \midrule \endfirsthead

\multicolumn{6}{c}{{\tablename\ \thetable{} -- continued from previous page}} \\ \addlinespace[1.7ex] \midrule \multicolumn{1}{c}{{Node}}&& \multicolumn{1}{c}{{Laurent polynomial}} && \multicolumn{2}{c}{{Mutations from Figure~\ref{fig:130a}}} \\ \midrule \endhead

\midrule \multicolumn{6}{c}{{Continued on next page}} \endfoot

\bottomrule \endlastfoot

507 && $x+\frac{2x}{y}+\frac{x}{y^2}+y+z+\frac{3}{y}+\frac{1}{yz}+\frac{2y}{x}+\frac{3}{x}+\frac{y}{x^2}$ && $804 \colon {}$ & $\left(\frac{xz}{y+z},\frac{xy}{y+z},y+z\right)$ \bottomspacer \\ \addlinespace[1.1ex]
 \rowcolor[gray]{0.95}
804 && $x+y+\frac{2y}{z}+z+\frac{2z}{y}+\frac{y^2}{xz^2}+\frac{4y}{xz}+\frac{6}{x}+\frac{4z}{xy}+\frac{1}{xy}+\frac{z^2}{xy^2}$ && $507 \colon {}$ & $\left(x+y,\frac{yz}{x+y},\frac{xz}{x+y}\right)$ \bottomspacer \\ \addlinespace[1.1ex]
 \end{longtable}
\end{center}
