\begin{center}
\footnotesize
\setlength{\mylength}{\baselineskip}
\begin{longtable}{rp{0ex}p{9cm}p{0ex}RL}
\caption{Laurent polynomials and selected mutations for bucket 12.}\\

\toprule \multicolumn{1}{c}{{Node}}&& \multicolumn{1}{c}{{Laurent polynomial}} && \multicolumn{2}{c}{{Mutations from Figure~\ref{fig:12a}}} \\ \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:12a}}} \\ \midrule \endhead

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

\bottomrule \endlastfoot

26 && $xy+x+y+z+\frac{1}{yz}+\frac{1}{x}$ && $73 \colon {}$ & $\left(\frac{xyz}{yz+1},\frac{yz+1}{xy},y\right)$ \spacer \\* 
 &&  && $167 \colon {}$ & $\left(\frac{xz+y}{xy},y,\frac{xz+y}{x^2yz}\right)$ \bottomspacer \\ \addlinespace[1.1ex]
 \rowcolor[gray]{0.95}
73 && $x+y+z+\frac{z}{x}+\frac{1}{x}+\frac{1}{xy}+\frac{1}{xyz}$ && $26 \colon {}$ & $\left(\frac{xyz+1}{yz},z,xy\right)$ \spacer \\* \rowcolor[gray]{0.95}
 &&  && $376 \colon {}$ & $\left(\frac{xyz+xz+y}{x^2yz},\frac{x^2z}{xyz+xz+y},\frac{xyz+xz+y}{x}\right)$ \bottomspacer \\ \addlinespace[1.1ex]
 167 && $x+y+z+\frac{z}{y}+\frac{y}{x}+\frac{1}{x}+\frac{1}{xy}+\frac{1}{x^2z}$ && $26 \colon {}$ & $\left(\frac{x+yz}{xyz},y,\frac{x^2y}{x+yz}\right)$ \bottomspacer \\ \addlinespace[1.1ex]
 \rowcolor[gray]{0.95}
376 && $xyz+x+yz+y+z+\frac{y}{x}+\frac{1}{x}+\frac{1}{xy}+\frac{1}{x^2z}$ && $73 \colon {}$ & $\left(\frac{xy^2z+yz+1}{xyz},\frac{1}{xy},\frac{xy^2z^2}{xy^2z+yz+1}\right)$ \bottomspacer \\ \addlinespace[1.1ex]
 \end{longtable}
\end{center}
