Alternative Equation Formats

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MathML

\begin{aligned} E (t_{1}) & = 2 (N - r_{X}) S_{t 3} + (N - r_{X})^{2} S_{t 1}^{2} \\ E (t_{2}) & = (N - r_{X}) ((N - r_{X}) + 2) S_{t 3} + 2 (N - r_{X}) \sum_{j_{1} = 2}^{r_{M}} \sum_{j_{2} = 1}^{j_{1} - 1} ϕ_{j_{1}}^{(E)} ϕ_{j_{2}}^{(E)} \end{aligned}

Math Rendered as SVG

Math as LaTeX Source

\begin{align*} \mr{E}(t_1) & = 2 (N - r_ X) S_{t3} + (N - r_ X)^2 S_{t1}^2 \\ \mr{E}(t_2) & = (N - r_ X) ((N - r_ X) + 2) S_{t3} + 2 (N - r_ X) \sum _{j_1=2}^{r_ M} \sum _{j_2=1}^{j_1-1} \phi _{j_1}^{(\mr{E})} \phi _{j_2}^{(\mr{E})} \end{align*}