Here is a little example of one.
To do this I clicked on the LaTex button in the ribbon.
I deleted the content that automatically come up, then I clicked on the matrices button.
I chose the square brackets.
If you want to learn LaTex so that you can do this type of thing, we can help you :)
\(\begin{bmatrix} 1 && 2 \\ 3 && 4 \end{bmatrix}\)
Here is a little example of one.
To do this I clicked on the LaTex button in the ribbon.
I deleted the content that automatically come up, then I clicked on the matrices button.
I chose the square brackets.
If you want to learn LaTex so that you can do this type of thing, we can help you :)
\(\begin{bmatrix} 1 && 2 \\ 3 && 4 \end{bmatrix}\)