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# Equations in HTML

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Here are some ideas for how to include equations in HTML documents.

## Candidates

<math xmlns="http://www.w3.org/1998/Math/MathML">
<mi>x</mi>
<mo>=</mo>
<mfrac>
<mrow>
<mrow>
<mo>-</mo>
<mi>b</mi>
</mrow>
<mo>&PlusMinus;</mo>
<msqrt>
<msup>
<mi>b</mi>
<mn>2</mn>
</msup>
<mo>-</mo>
<mrow>
<mn>4</mn>
<mo>&InvisibleTimes;</mo>
<mi>a</mi>
<mo>&InvisibleTimes;</mo>
<mi>c</mi>
</mrow>
</msqrt>
</mrow>
<mrow>
<mn>2</mn>
<mo>&InvisibleTimes;</mo>
<mi>a</mi>
</mrow>
</mfrac>
[/itex]


## Rejected

$x = \frac{-b \pm \sqrt{b^2 - 4ac}}{2a}$