<!DOCTYPE html> <html> <head> <title>mfrac bevelled</title> </head> <body> <math> <mfrac style="font-size: 300%"> <mspace width="20px" height="20px" mathbackground="red"></mspace> <mspace width="20px" height="20px" mathbackground="red"></mspace> </mfrac> </math> </body> </html>