color chalkboard with function mathematical icon isolated white background school blackboard sign gradient random |
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| navigate by keyword : back background banner billboard blackboard blank board business chalk chalkboard class classroom color colorful concept copy design dirty education empty flat frame function gradient graphic icon illustration isolated learning lesson mathematics object old retro rub school sign space study symbol teacher teaching template university vector white wood wooden write |
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| Color Chalkboard with function mathematical icon isolated on white background. School Blackboard sign. Gradient random dynamic shapes. Vector Illustration |
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