Alternative Equation Formats

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MathML

$\begin{array}{c}PDF({}^{\prime }LOGN{}^{\prime },x,\theta ,\lambda )=\{\begin{array}{cc}0\hfill & x\le 0\hfill \\ \frac{1}{x\lambda \sqrt[]{2\pi }}exp(-\frac{{(log\left(x\right)-\theta )}^2}{2{\lambda }^2})\hfill & x>0\hfill \end{array}\hfill \end{array}$

MathML rendered with MathJax