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Teacher writing formulas on the chalk Board and explains the students the formula.

Name: Teacher writing formulas on the chalk Board and explains the students the formula.
Uploaded: 2018-10-08
Duration: 23 s
Channel: denisyakovlev
Description: Teacher writing formulas on the chalk Board and explains the students the formula.

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34.56 MB

denisyakovlev

109381860

23.99s

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