Single brace grouping lines of text
This can be done by using the gathered environment, like this example with a curly bracket:
$left{ begin{gathered}
mathrm{x} hfill \
mathrm{y} hfill \
mathrm{z} hfill \
end{gathered} right.$
I can’t remember where I found this, but it was on a forum explaining how to do one bracket with multiple lines of text inside it.