Alternative Equation Formats

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MathML

f (y) = \frac{1}{y_{1}! \dots y_{k}!} π_{1}^{y_{1}} \dots π_{k}^{y_{k}}

\[ f(\mb{y}) = \frac{1}{y_1!\cdots y_ k!} \pi _1^{y_1} \, \cdots \, \pi _ k^{y_ k} \]