Alternative Equation Formats

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MathML

{\hat{ω}}^{2} = \frac{{\hat{σ}}_{η}^{2}}{(1 - \sum_{i = 1}^{p} {\hat{a}}_{i})^{2}}

\[ \hat{\omega }^2 = \frac{\hat{\sigma }^2_{\eta }}{(1-\sum _{i=1}^{p}{\hat{a}_ i})^2} \]