man taking notes math theorem blackboard |
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navigate by keyword : adult asian black blackboard blank board chalk chalkboard class classroom concept difficult education ethnic hands holding idea learning male man math mathmatician memo multi notebook notepad notes notice one oriental pad paint pen people person problem pythagoras pythagorean racial representation school schooling scribble standing student taking teacher texture theorem triangle unrecognisable visual wood writing young |
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Man taking notes of math theorem from blackboard |
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