Myself, and I assume other SEO professionals would not share that information, as we are mainly using un-official search operators, which when Google catches them, they disable them.

If someone thinks he would like to reveal one, it would be interesting for me too, if I do not have that one already.

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"Being an expert isn't telling other people what you know. It's understanding what questions to ask, and flexibly applying your knowledge to the specific situation at hand. Being an expert means providing sensible, highly contextual direction." Jeff Atwood
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