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man writing scientific equations on a chalk board
MS Rear view of young woman writing mathematical formula on blackboard
Rear view of man against chalkboard with math formula equations. He think about solution and try to understand high university task.
Tracking shot of focused male university professor writing math formula on blackboard
Two young handsome successful scientists in formal suit and tie, spectacles and medical gown writing, discussing and analyzing math equations on a chalk desk board. Handy life camera. Close-up.
Two young successful modern scientists in formal suit, glasses and medical gown writing, discussing and analyzing math equations on a chalk desk board. Middle static shot.
medical interns discuss writing of equation on clear board
Hand writing and drawing equation with marker on white board
MS Man writing on blackboard turns, looking at camera
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