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Jdp58889
@jdp58889
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0:19
An introduction to waves-1Vb
7 years ago
0:41
Friction-s4EbM
7 years ago
0:31
The mathematics of folding a piece of paper-B_rM_c4
7 years ago
0:29
How to draw a tangent to a circle from a point-WHym_d8
7 years ago