I'm not sure what you're talking about? My example contains no periods and only one kind of brackets? Did you reply to the wrong post? Admittedly, it might be

I'm not sure what you're talking about? My example contains no periods and only one kind of brackets? Did you reply to the wrong post? Admittedly, it might be written with $ in practice, but that's a fairly simple idiom, and I tend to avoid it.