black chalkboard with function mathematical icon isolated white background school blackboard sign silver gold |
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| navigate by keyword : back background banner billboard blackboard blank board business button chalk chalkboard class classroom concept copy design dirty education empty flat frame function gold golden graphic icon illustration isolated learning lesson mathematics object old retro rub school sign silver space square study symbol teacher teaching template university vector wood wooden write |
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| Black Chalkboard with function mathematical icon isolated on white background. School Blackboard sign. Silver-gold square button. Vector Illustration |
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