<!DOCTYPE html> <html> <head> <title>Test mpadded</title> </head> <body> <math> <!--if height, depth or width is a negative value, 0px is the value applied --> <mpadded mathbackground="blue" width="100px" height="100px" depth="-100px" lspace="20px" voffset="10px"> <mpadded mathbackground="red" width="20px" height="10px" depth="10px"> </mpadded> </mpadded> </math> </body> </html>