\begin{center}
\footnotesize
\setlength{\mylength}{\baselineskip}
\begin{longtable}{rp{0ex}p{9cm}p{0ex}RL}
\caption{Laurent polynomials and selected mutations for bucket 19.}\\

\toprule \multicolumn{1}{c}{{Node}}&& \multicolumn{1}{c}{{Laurent polynomial}} && \multicolumn{2}{c}{{Mutations from Figure~\ref{fig:19a}}} \\ \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:19a}}} \\ \midrule \endhead

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

\bottomrule \endlastfoot

71 && $x+\frac{x}{z}+y+z+\frac{1}{yz}+\frac{1}{x}+\frac{1}{xy}$ && $157 \colon {}$ & $\left(\frac{y+z+1}{xy},y,\frac{y+z+1}{xyz}\right)$ \bottomspacer \\ \addlinespace[1.1ex]
 \rowcolor[gray]{0.95}
157 && $x+y+z+\frac{1}{x}+\frac{1}{xz}+\frac{z}{xy}+\frac{2}{xy}+\frac{1}{xyz}$ && $71 \colon {}$ & $\left(\frac{xyz+xy+1}{yz},z,\frac{1}{xy}\right)$ \spacer \\* \rowcolor[gray]{0.95}
 &&  && $165 \colon {}$ & $\left(x+y,\frac{y}{x(x+y)},\frac{1}{z(x+y)}\right)$ \spacer \\* \rowcolor[gray]{0.95}
 &&  && $200 \colon {}$ & $\left(x,\frac{y+1}{xyz},y\right)$ \bottomspacer \\ \addlinespace[1.1ex]
 165 && $\frac{x^2z}{y}+xz+x+\frac{2x}{y}+y+z+\frac{1}{yz}+\frac{1}{x}$ && $157 \colon {}$ & $\left(\frac{x}{xy+1},\frac{x^2y}{xy+1},\frac{1}{xz}\right)$ \spacer \\* 
 &&  && $201 \colon {}$ & $\left(x,\frac{x+yz}{z},\frac{1}{yz}\right)$ \spacer \\* 
 &&  && $305 \colon {}$ & $\left(\frac{xyz}{yz+(z+1)^2},y,\frac{yz+(z+1)^2}{xy}\right)$ \spacer \\* 
 &&  && $948 \colon {}$ & $\left(\frac{xyz+1}{x^2yz},\frac{xyz+1}{xy},y\right)$ \bottomspacer \\ \addlinespace[1.1ex]
 \rowcolor[gray]{0.95}
200 && $x+yz+y+z+\frac{1}{x}+\frac{1}{xz}+\frac{1}{xy}+\frac{1}{xyz}$ && $157 \colon {}$ & $\left(x,z,\frac{z+1}{xyz}\right)$ \bottomspacer \\ \addlinespace[1.1ex]
 201 && $x+\frac{x}{z}+\frac{x}{y}+\frac{x}{yz}+y+z+\frac{1}{yz}+\frac{1}{x}$ && $165 \colon {}$ & $\left(x,\frac{y}{xz+1},\frac{xz+1}{yz}\right)$ \bottomspacer \\ \addlinespace[1.1ex]
 \rowcolor[gray]{0.95}
305 && $x+y+z+\frac{z}{x}+\frac{1}{x}+\frac{z^2}{xy}+\frac{3z}{xy}+\frac{3}{xy}+\frac{1}{xyz}$ && $165 \colon {}$ & $\left(\frac{xyz+(xz+1)^2}{yz},y,xz\right)$ \spacer \\* \rowcolor[gray]{0.95}
 &&  && $375 \colon {}$ & $\left(x,\frac{(y+z)^2}{xy^2z},\frac{z}{y}\right)$ \bottomspacer \\ \addlinespace[1.1ex]
 375 && $x+y+z+\frac{z}{y}+\frac{1}{x}+\frac{1}{xz}+\frac{z}{xy}+\frac{2}{xy}+\frac{z}{xy^2}$ && $305 \colon {}$ & $\left(x,\frac{(z+1)^2}{xyz},\frac{(z+1)^2}{xy}\right)$ \spacer \\* 
 &&  && $1334 \colon {}$ & $\left(\frac{x^3z^2}{x^2z^2+xyz+y},\frac{x^2z^2+xyz+y}{x^2z},y\right)$ \bottomspacer \\ \addlinespace[1.1ex]
 \rowcolor[gray]{0.95}
948 && $x+y+z+\frac{y}{x}+\frac{1}{x}+\frac{2}{xz}+\frac{1}{xy}+\frac{y}{x^2z}+\frac{1}{x^2z}+\frac{1}{x^2yz}+\frac{1}{x^3z^2}$ && $165 \colon {}$ & $\left(\frac{x+yz}{xyz},z,\frac{y^2z}{x+yz}\right)$ \bottomspacer \\ \addlinespace[1.1ex]
 1334 && $x+y+z+\frac{y}{x}+\frac{y}{xz}+\frac{1}{x}+\frac{2}{xz}+\frac{1}{xy}+\frac{2y}{x^2z}+\frac{1}{x^2z}+\frac{y}{x^3z^2}+\frac{1}{x^3z^2}$ && $375 \colon {}$ & $\left(\frac{x^2y^2+xyz+z}{xy^2},z,\frac{x^2y^3}{x^2y^2+xyz+z}\right)$ \bottomspacer \\ \addlinespace[1.1ex]
 \end{longtable}
\end{center}
