mathematics elements set hand drawn math geometry algebra symbols chalkboard school green board chalk |
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| navigate by keyword : math mathematics graph geometric blackboard chalkboard chalk protractor education school business formula sketch doodle equation handwritten geometry student algebra trigonometry hand drawn lesson science calculate board vector illustration symbol number sign concept study drawing icon design percent proportions pythagoras theorem triangle exponent parallelogram trapezoid sine cosines cone green pattern |
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| Mathematics elements set. Hand drawn math geometry, algebra symbols on chalkboard. School green board chalk freehand sketch line, protractor. Education concept isolated vector illustration |
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