<math>
 <mrow>
 <mi>A</mi>
 <mpadded width='1.5 height'><mi>A</mi></mpadded>
 <mi>A</mi>
 <mpadded width='3 width'><mi>A</mi></mpadded>
 <mi>A</mi>
 <mpadded width='150% width'><mi>A</mi></mpadded>
 <mi>A</mi>
 <mpadded width='2 em'><mi>A</mi></mpadded>
 <mi>A</mi>
 <mpadded width='12 pt'><mi>A</mi></mpadded>
 <mi>A</mi>
 </mrow>
</math>