\begin{center}
\footnotesize
\setlength{\mylength}{\baselineskip}
\begin{longtable}{rp{0ex}p{9cm}p{0ex}RL}
\caption{Laurent polynomials and selected mutations for bucket 30.}\\

\toprule \multicolumn{1}{c}{{Node}}&& \multicolumn{1}{c}{{Laurent polynomial}} && \multicolumn{2}{c}{{Mutations from Figure~\ref{fig:30a}}} \\ \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:30a}}} \\ \midrule \endhead

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

\bottomrule \endlastfoot

59 && $x+y+z+\frac{y}{x}+\frac{2}{x}+\frac{1}{xy}+\frac{1}{xyz}$ && $179 \colon {}$ & $\left(x,y+z,\frac{y}{z}\right)$ \bottomspacer \\ \addlinespace[1.1ex]
 \rowcolor[gray]{0.95}
179 && $x+y+\frac{y}{z}+z+\frac{y}{x}+\frac{z}{x}+\frac{2}{x}+\frac{1}{xy}$ && $59 \colon {}$ & $\left(x,\frac{1}{y(x+1)},\frac{xz}{x+1}\right)$ \spacer \\* \rowcolor[gray]{0.95}
 &&  && $576 \colon {}$ & $\left(\frac{xyz+(y+1)^2}{xy},y,\frac{xyz+(y+1)^2}{x^2z}\right)$ \bottomspacer \\ \addlinespace[1.1ex]
 576 && $x+y+z+\frac{2y}{x}+\frac{y}{xz}+\frac{2}{x}+\frac{1}{xy}+\frac{y^2}{x^2z}+\frac{2y}{x^2z}+\frac{1}{x^2z}$ && $179 \colon {}$ & $\left(\frac{xy^2+z(y+1)^2}{xyz},y,\frac{x^2y^2}{xy^2+z(y+1)^2}\right)$ \bottomspacer \\ \addlinespace[1.1ex]
 \end{longtable}
\end{center}
