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A man with a beard is writing on a blackboard, illuminated by a warm, focused light.
Image details
File type JPG
Size 4368×2448
Published 14:07

Category
Free use with a link to us.
Commercial use requires a paid subscription.
A man with a beard is writing on a blackboard, illuminated by a warm, focused light.
Image details
File type JPG
Size 4368×2448
Published 14:07
Category
Comments about Bearded Man Working on Equations