How do you type equations when asking a question. For example what exactly do click to write X=( 1 2) transposed.Do I need to click say html option in Body menu and then do what ?

How do you type equations at physics stack exchange. Seems like mathjax is proposed, but what are the steps ? ThanksSorry about the tag and if this not the correct place to ask for help.

An old question, \oiint doesn't seem to work, asks whether it's possible to get the LaTeX command\oiint to work on this site.The MathJax team has recently ...

In this answer the MathJax isn’t rendering, but it does render if you go into Edit mode.

For example, some symbols in this Physics SE answer are rendered as empty glyphs on my macOS machine when viewed in Chrome:Firefox renders the page correctly. Is there a font pack that I should ...

I notice quite often that:Edit proposals that are meant to improve MathJax typesetting, appear borderline with regards to being superfluous/helpful to the postSome edit reviewers do a fair amount ...

I will often blockquote from OP's question, especially when I want to steal OP's MathJax markup rather than re-write it myself.However, when an edit is pending I know of no way to view OP's MathJax. ...

$\require{mhchem}$Inspired by a question on chemistry.se (now closed, because it was a cross post from Phys.SE), I observe the mhchem extension can be used here provided the question/answer contains ...

I tried to answer a question and in the edit mode MathJax shows the equations properly, but when I click on "save" some equations are not rendered (?) at all, and I see only the MathJax code....

Here's a screenshot of part of a question as displayed by Chrome on my MacBook Air:You can see that some characters are rendered as boxes. Here's more or less the same bit as displayed on Safari:...

While I agree that MathJax makes things convenient and far more readable, it seems unfair to demand fresh new users to learn it before posting a question, which is something of a common occurence here....

For whatever reason, when I put the first equation in the question box it renders correctly (in the preview) on the math Stack Exchange site, but wrong on the physics Stack Exchange site (PSE). The ...

When I open a link on Stack Exchange, the math equations just can't show correctly. How do I fix it? (I've tried reinstalling Chrome, but it wouldn't work. But things go well in the Edge browser.)For ...

In an answer, I wanted to write∼, but that wasn’t showing. I think it wasn’t showing for Markdown.So I thought I should use ...

I have a question about my Physics Stack Exchange post: A new way to define matrix-vector products, to relate physical fundamental constants and units of measureI'm trying to convert my post to ...