Alternative Equation Formats

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MathML

\begin{array}{rcl} L_{j} & = & Pr (Y = y_{j} | x_{j}) \\ = & {\begin{cases} \frac{e^{α_{i} + x_{j} β_{i}}}{1 + \sum_{i = 1}^{k} e^{α_{i} + x_{j} β_{i}}} & 1 \leq y_{j} = i \leq k \\ \frac{1}{1 + \sum_{i = 1}^{k} e^{α_{i} + x_{j} β_{i}}} & y_{j} = k + 1 \end{cases} \end{array}

Math Rendered as SVG

Math as LaTeX Source

\begin{eqnarray*} L_ j & =& {\Pr }({Y}=y_ j|\mb{x}_ j) \\ & =& \left\{ \begin{array}{ll} \displaystyle \frac{ {e}^{\alpha _ i+\mb{x}_ j{\bbeta }_ i}}{1+\sum _{i=1}^{k} {e}^{\alpha _ i+\mb{x}_ j {\bbeta }_ i}} & 1\le y_ j=i\le k \\ \displaystyle \frac{1}{1+\sum _{i=1}^{k} {e}^{\alpha _ i+\mb{x}_ j {\bbeta }_ i}} & y_ j=k+1 \end{array} \right. \end{eqnarray*}