<param name=macros value="\define{\basis}[1]{e_{#1}}"> <param name=eq value="x=\basis{y + z}">
<param name=macros value=" \define{\at}{\tilde{\alpha}} \define{\disc}[3]{\sqrt{#2^2 - 4 #1 #3}}"> <param name=eq value="\at = \frac{-b \pm \disc{a}{b}{c}}{2a}">More information on macros may be found in Sec. 3 of the WebTeX documentation.
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