Alternative Equation Formats

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MathML

s^{2} = \sum_{i = 1}^{R} n_{i \cdot} (R_{i} - \bar{R})^{2}

s^{2} = \sum_{i = 1}^{R} n_{i \cdot} (R_{i} - \bar{R})^{2}

\[ s^2 = \sum _{i=1}^ R n_{i \cdot } (R_{i} - \bar{R})^2 \]