Alternative Equation Formats

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MathML

\frac{1}{F} \sum_{i} f_{i} \sum_{j} (y_{i j} - {\hat{π}}_{i j})^{2}

\frac{1}{F} \sum_{i} f_{i} \sum_{j} (y_{i j} - {\hat{π}}_{i j})^{2}

$\frac{1}{F}\sum _ if_ i\sum _ j(y_{ij}-\widehat{\pi }_{ij})^2$