# How many variations of this grey background are there?

In Math Stack Exchange, it is common to find in an answer the question rewritten like this:

Find the remainder when $$2^{55}+1$$ is divided by $$33$$

Then you find someone has hidden one of their answers like this:

Hint: $$2^{55}+1=(33-1)^{11}+1$$

So my question is, are there any more variations of that grey background?

• This does not have much to do with MathJax; it's Markdown that is used for formatting posts (except for mathematical formulas where MathJax is used). I changed the tag.
– quid Mod
Mar 23, 2020 at 19:07
• @quid Appreciate it. Thanks for the info Mar 23, 2020 at 19:16
– JRN
Mar 24, 2020 at 5:27

This is preformatted text. It is especially useful for code.

This line is very long. This line is very long. This line is very long. This line is very long. This line is very long. This line is very long. This line is very long. This line is very long. This line is very long. This line is very long. This line is very long. This line is very long. This line is very long. This line is very long. Really it is.

Another difference is that it uses a mono spaced font. I think the main use case is for including pieces of code. Something similar can be obtained using backticks like this. For this one has to put (`), without the parenthesis, at the beginning and at the end. Note it must not be confused with ('), which has no particular function.