Mixed $x^2$ caption

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label $\ell$  │ formula $f(x)$        $\beta$
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
case $\alpha$ │ $\psi(u)$             escaped \$100 and $y=1$
case b        │ ruin $\psi(u)$ falls  $10 to $20
case c        │ plain                 $5-$10
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
Note: A note with $\sigma$ inside.
