Using a big brace over multiple lines - multiple lines left of it – tex.stackexchange.com

Using a big brace over multiple lines - multiple lines left of it –
tex.stackexchange.com

I am super helpless, I wanna do the following: Mathmode, 2 lines on the
left, a brace over both (using array) and than I wanna have 3 lines on the
right. A small example: \begin{align*} \left. ...