·Apr 20, 2015

pen

Name: pen
Uploaded: 2015-04-20T04:52:01.000Z
Duration: 11 s
Channel: Алексей Гуров
Description: A white pen with a red tip moves across a sheet of graph paper, writing mathematical equations and expressions, while a printed worksheet with Russian text and a graph lies in the background on a light green surface.

Description

A white pen with a red tip moves across a sheet of graph paper, writing mathematical equations and expressions, while a printed worksheet with Russian text and a graph lies in the background on a light green surface.