<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml"><head><title>Lambdoc document</title><meta charset="utf-8"/><link rel="stylesheet" href="css/lambdoc.css" media="all" title="Default"/></head><body><div class="doc doc_valid"><div class="doc_math_blk"><math
xmlns="http://www.w3.org/1998/Math/MathML"
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lspace="0.278em"
rspace="0.278em"
>=</mo
><mfrac
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><mn
>2</mn
></msup
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lspace="0"
rspace="0"
>+</mo
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><mi
>a</mi
><mn
>2</mn
></msup
><mo
lspace="0"
rspace="0"
>+</mo
><msup
><mi
>b</mi
><mn
>2</mn
></msup
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></mrow
><mrow
><mn
>1</mn
><mo
lspace="0"
rspace="0"
>+</mo
><msup
><mi
>y</mi
><mn
>2</mn
></msup
></mrow
></mfrac
></mrow
></math
></div></div></body></html>
