So, let's say I want to search for scientific articles dealing with Chocolate made from plants cultivated on Mars.

Is this search string correct?:

(Chocolate OR Cacao) AND (Mars OR Martian OR "red planet") AND (cultivation OR crop OR fields)

I tried to type it on "advance search" but the site does not allow to put booleans operators between parenthesis (only within). So, I guess I should do it like this:

(Chocolate OR Cacao AND Mars OR Martian OR "red planet" AND cultivation OR crop OR fields)

but I guess the program does not give priority to the AND over the OR...

Thanks! (I hope I was clear enough)

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