Chalkboard filled with mathematical formulas and diagrams in white chalk.
Contributor: Tasnim
ID : 937828565
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Keywords
blackboard, mathematic, formula, diagram, chalk, education, science, blackboard, school, white, teaching, learning, number, mathematic, cognition, calculation, abstract, pattern, concept, black, academic, theory, geometry, physics, symbol, classroom, board, scientificRelated items
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