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<html xmlns="http://www.w3.org/1999/xhtml"
xmlns:mathml="http://www.w3.org/1998/Math/MathML">
<body onload="run()">
<mathml:math id="test" style="display: block">
</mathml:math>
<script>
function run() {
var t1 = document.createElementNS("http://www.w3.org/1998/Math/MathML",
"mtable");
var t2 = document.createElementNS("http://www.w3.org/1998/Math/MathML",
"mtable");
var r1 = document.createElementNS("http://www.w3.org/1998/Math/MathML",
"mtr");
var r2 = document.createElementNS("http://www.w3.org/1998/Math/MathML",
"mtr");
var test =
document.getElementsByTagNameNS("http://www.w3.org/1998/Math/MathML", "math")[0];
t1.appendChild(r1);
test.appendChild(t1);
test.appendChild(t2);
t2.appendChild(r2);
}
</script>
</body>
</html>
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