# There's a loophole for the 15-characters-per-comment requirement [duplicate]

I saw a certain loophole used somewhere on Mathematics to get around the 15-character minimum for comments. Normally, it wouldn't be visible, but when I clicked 'refresh', the LaTeX on a page flashes without the dollar signs - in other words, for a split second, $y=x^2$ appears as y=x^2.

The shortcut used is to simply write the expression ${}{}{}{}{}{}{}{}$, which leaves a blank comment. You can cut down the pairs of brackets and insert a small phrase that would otherwise not make it past the 15-character limit.