<html><head><meta name="color-scheme" content="light dark"></head><body><pre style="word-wrap: break-word; white-space: pre-wrap;">\begin{psmatrix}
A &amp; B \\
$\sqrt{\frac{x + y}{z}}$ &amp; D
\ncline{-&gt;}{1,1}{1,2}
\ncline{-&gt;}{1,2}{2,2}
\ncline{-&gt;}{2,2}{2,1}
\ncline{-&gt;}{2,1}{1,1}
\end{psmatrix}
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