Wrong Sum Stock Videos

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a man wearing a shirt and a wedding ring uses a blackboard eraser to wipe out mistakes in chalk on a free-standing blackboard placed in a large room lit by natural light before drawing the axis of a graph, uk. - wrong sum stock videos & royalty-free footage
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A man wearing a shirt and a wedding ring uses a blackboard eraser to wipe out mistakes in chalk on a free-standing blackboard placed in a large room lit by natural light before drawing the axis of a graph, UK.
Lecturer, Old-fashioned, Chalk Drawing
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