From WeBWorK

<math>	<dmath>
\int_a^x f(\alpha\,)\,dx	\displaystyle \int_a^x f(\alpha\,)\,dx
\sqrt{\sqrt{\sqrt{x}}}	\displaystyle \sqrt{\sqrt{\sqrt{x}}}
\left( \begin{smallmatrix} a&b \\ c&d \end{smallmatrix} \right)	\displaystyle \left( \begin{smallmatrix} a&b \\ c&d \end{smallmatrix} \right)
\sqrt{x^2+2x+1}=|x+1| - \left(\left(\frac{2x^2}{x}\right)^2\right)^2	\displaystyle \sqrt{x^2+2x+1}=|x+1| - \left(\left(\frac{2x^2}{x}\right)^2\right)^2
\ E = \sum_{i=1}^N e^{- J_{ij} \sigma_i \sigma_j}	\displaystyle \ E = \sum_{i=1}^N e^{- J_{ij} \sigma_i \sigma_j}
\therefore	\displaystyle \therefore