Can we put some paragraphs inside a box?

Question

I have some paragraphs, for example,

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1. For inline formulas, enclose the formula in $…$. For displayed formulas, use $$…$$.

   • These render differently. For example, type the following to show inline mode:
     $\sum_{i=0}^n i^2 = \frac{(n^2+n)(2n+1)}{6}$
     $\sum_{i=0}^n i^2 = \frac{(n^2+n)(2n+1)}{6}$
   • or type the following for display mode:
     $$\sum_{i=0}^n i^2 = \frac{(n^2+n)(2n+1)}{6}$$
     $$\sum_{i=0}^n i^2 = \frac{(n^2+n)(2n+1)}{6}$$

2. For Greek letters, use \alpha, \beta, …, \omega: $\alpha$, $\beta$, …, $\omega$.

   • For uppercase letters, use \Gamma, \Delta, …, \Omega: $\Gamma$, $\Delta$, …, $\Omega$.
   • For other Greek capital letters, use Latin $A,, B, E$ and so on: $A, B, E$.
   • Some Greek letters have variant forms: \epsilon \varepsilon $\epsilon$, $\varepsilon$, \phi \varphi $\phi$, $\varphi$, and others.

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Is there a mathjax syntax to put above paragraphs inside a box? This is to separate (and thus highlight) a theorem statement in a thread.

Thank you so much!