How / where can I enable nested parenthetical sub-expressions?

How does one set conditions such as below in RM?

(A && B) || C


(A || B) && C


Notice the --> ( sub-expression

That's where you introduce the opening left paren. After you do that, and enter a term, you will be presented with the choice of AND, OR or ) .

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Thank you @bravenel! I actually deleted my message because I had just figured it out... But I couldn't delete the topic itself. Sorry for wasting your time on this!