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Pth09209
@pth09209
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0:17
The mathematics of folding a piece of paper-B_rM_
7 years ago
0:15
Key pad electronics demo-qUOaYACZ
7 years ago
0:44
2 cubed (and why it isn't 6)-8KlJNeqel
7 years ago
0:21
How to draw a pentagon-xUvJhWlwp
7 years ago