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Published: 2014-01-31 22:11:06.087593 Category: Mathematics Type: Photo Model release: NoShare
Hand writing with chalk a mathematical exercise
Contributor: Gajus
ID : 60927791
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Keywords
mathematic, scientific, education, college, presentation, formula, mathematical, blackboard, teaching, lecture, prof, development, solution, invention, researcher, business, businessman, conceptual, hand, man, writing, communication, closeup, blackboard, teacher, training, university, chalk, class, classroom, handwritten, answer, research, innovationRelated items
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