Alternative Equation Formats

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MathML

\begin{array}{rcl} E (y) & = & a + b x \\ E (y^{2}) & = & (a + b x)^{2} + s^{2} \end{array}

\begin{eqnarray*} E(y) & =& a + b x \\ E(y^2) & =& (a+bx)^2 + s^2 \nonumber \end{eqnarray*}