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Published: 2012-04-08 20:58:15.724508 Category: School Type: Illustration Model release: No
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Equations on blackboard.

Contributor: borisshevchuk
ID : 40504483
TitleFilesize
Illustration4500x3500


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Keywords
formula, calculate, chalk, blackboard, exam, cognition, learn, lecture, lesson, line, mathematic, mathematical, mathematic, number, physics, school, science, signs, solution, study, studying, symbol, instructing, theory, write, diagram, vignetting, blackboard, education, texture, board, dirty, old, scratch, used, background, drawing, concept, illustration, graphic, handwriting


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