My <math> problem mysteriously went away. Perhaps the rendering of the formula into the .png file takes some time. FWIW, here's what didn't work and now does work:

Testing other <math> stuff...

single-hyphen double--hyphen triple---hyphen quad----hyphen n–dash m—dash

Let's try a template: This is Ksn's test template.

Conversions: 2.0 and 2.2 metres (6.562 and 7.218 ft); 2.0 and 2.2 feet (24.000 and 26.400 in)

Template:Convert

Template: Main

Template: See also

Wikipedia:Templates