<!DOCTYPE html> <html class="reftest-wait"> <head> <title>mfrac denomalign</title> <script type="text/javascript"> function doTest() { document.getElementById("testMfrac").setAttribute("denomalign","left"); document.documentElement.removeAttribute("class"); } window.addEventListener("MozReftestInvalidate",doTest, false); </script> </head> <body> <math> <mfrac id="testMfrac" style="font-size: 300%"> <mrow><mn>a</mn><mo>+</mo><mn>b</mn><mo>+</mo><mn>c</mn><mo>+</mo><mn>d</mn><mo>+</mo><mn>e</mn></mrow> <mi>x</mi> </mfrac> </math> </body> </html>