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[–] ezpz 0 points 1 point (+1|-0) ago 

On top of Khan Academy and Wolfram, I also used tutorials off a guy named Nigel Simmons on youtube - recorded lectures with audio. He is Australian though, so you might not understand lol.

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[–] cityfox 0 points 1 point (+1|-0) ago  (edited ago)

NASCA International. Oh wait, you said poly nomials...