front view, a lot of mathematical equations on the blackboard, soft light
Contributor: paisorn
ID : 737362077
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Keywords
mathematic, mathematic, blackboard, education, equation, science, school, formula, background, algebra, physics, blackboard, solution, mathematical, study, chalk, signs, board, complex, university, cognition, number, teacher, learn, symbol, white, geometry, pattern, theory, vector, problem, lesson, illustration, college, trig, black, texture, worked, concept, classroom, drawing, proof, student, calculation, handwritten, handwriting, calculate, seamless, researchRelated items
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