Close up Caucasian man mathematician writing formulas and laws on transparent screen in classroom. Blackboard with digits and drawing on background. Male teacher or scientist counting and explaining.
GLIX-111-415601832
Kollekció
GLIX Easy
Leírás
Close up Caucasian man mathematician writing formulas and laws on transparent screen in classroom. Blackboard with digits and drawing on background. Male teacher or scientist counting and explaining.
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