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Thank you so much! Its like you’ve flipped a switch in my brain somehow. Its my 2nd time around in calc1, I just couldn’t wrap my mind around calc. concepts until I found you. And that’s saying a lot because I had to take trig. 3 times before I felt competent enough to take calc. Please accept my sincere thanks. You Sir, are a God send.
Jeff S (on a CCM YouTube video about the Chain Rule)

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