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Math Symbols with Book on Chalk Board. Math Symbols with Book. This royalty free vector illustration features a set of hand-drawn math educational icons and images . The various back to school and education drawings create a collage and vary in size. Each drawing can be used independently or as part of this vector graphic set. The drawings have a natural sketchy feel yet carry a high level of detail. The composition fills the entire illustration. The thickness of the stroke line varies to give this image a unique summer look and feel.