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This is a great youtube channel as well! I liked this review on a planar planimeter and how it ties in to Green's Theorem.

https://www.youtube.com/watch?v=jMvEOmpy8Kw

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Wow it really is great. Plan to share with everyone I know who would find this interesting. Already watched a few of them and they are all just as enjoyable. Hope he gets a bunch more subs and keeps making videos.

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