Sorry maybe it's not typical mathematics question, but Desmos is very helpful in solving and testing mathematics issues, so maybe anyone could help me.

I can't figure it out how to use AND condition in Desmos

For example to make OR you can just use "comma", like that:

$ y=\{ A<0 \ \ \ \ , \ \ \ \ B>1 :\ f_1(x), \ \ \ \ f_2(x) \} $

But how to make AND? I mean something like that:

$ y=\{ A<0 \ \ \ \ AND \ \ \ \ B>1 : \ f_1(x), \ \ \ \ f_2(x) \} $

But that just doesn't work.

For any help thanks in advance.