<!DOCTYPE html> <html> <head> <title>subscript</title> <meta charset="utf-8"/> </head> <body style="background: #5f5; font-size: 50px;"> <div> <math> <msubsup> <mi mathbackground="#5f5">f</mi> <mspace id="s0" width="50px" height="50px" mathbackground="blue"/> <mspace id="s1" width="50px" height="50px" mathbackground="blue"/> </msubsup> </math> </div> <br/> <div> <math> <mmultiscripts> <mi mathbackground="#5f5">f</mi> <mspace id="s2" width="50px" height="50px" mathbackground="blue"/> <mspace id="s3" width="50px" height="50px" mathbackground="blue"/> <mspace id="s4" width="50px" height="50px" mathbackground="blue"/> <mspace id="s5" width="50px" height="50px" mathbackground="blue"/> <mspace id="s6" width="50px" height="50px" mathbackground="blue"/> <mspace id="s7" width="50px" height="50px" mathbackground="blue"/> </mmultiscripts> </math> </div> </body> </html>