\begin{table}
\centering
\begin{tblr}[         %% tabularray outer open
]                     %% tabularray outer close
{                     %% tabularray inner open
colspec={Q[]},
}                     %% tabularray inner close
\toprule
$y^2 = e^x$ \\ \midrule %% TinyTableHeader
$-2   $ \\
$-3.14$ \\
\bottomrule
\end{tblr}
\end{table} 
