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Zch41703
@zch41703
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0:34
How to draw a tangent to a circle from a point-W
7 years ago
0:26
How to draw a pentagon-xUvJ
7 years ago
0:31
2 cubed (and why it isn't 6)-8K
7 years ago
0:43
An introduction to waves-1Vbv7
7 years ago