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Published: 2015-09-17 04:45:08.275894 Category: School Type: Photo Model release: No
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Maths formulas on chalkboard background

Contributor: christianchan
ID : 91532560
TitleFilesize
Photo5184x3456


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Keywords
mathematic, student, board, calculus, blackboard, algebra, scribble, white, mathematic, triangle, formula, teacher, sample, geometry, signs, line, classroom, cube, symbol, drawing, illustration, complex, slate, solution, science, problem, pyramid, school, education, background, college, seamless, minus, proof, plus, pattern, side, trig


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