Alternative Equation Formats

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MathML

{\hat{W}}_{j} (x) = \frac{1}{\sqrt{K}} \sum_{i = 1}^{K} {\sum_{k = 1}^{n_{i}} I (x_{i k j} \leq x) e_{i k} + η^{'} (x, \hat{β}) I_{0}^{- 1} {\hat{D}}_{i}^{'} {\hat{V}}_{i}^{- 1} e_{i}} Z_{i}

MathML rendered with MathJax

{\hat{W}}_{j} (x) = \frac{1}{\sqrt{K}} \sum_{i = 1}^{K} {\sum_{k = 1}^{n_{i}} I (x_{i k j} \leq x) e_{i k} + η^{'} (x, \hat{β}) I_{0}^{- 1} {\hat{D}}_{i}^{'} {\hat{V}}_{i}^{- 1} e_{i}} Z_{i}

Math as LaTeX Source

\[ \hat{W}_ j(x)= \frac{1}{\sqrt {K}}\sum _{i=1}^ K\left\{ \sum _{k=1}^{n_ i}I( x_{ikj} \le x)e_{ik} + \bm {\eta }^\prime (x,\hat{\bbeta }) \mb{I}_0^{-1} \hat{\mb{D}}^\prime _ i\hat{\mb{V}}_ i^{-1}\mb{e}_ i \right\} Z_ i \]