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Attractive pensive young european businessman with abstract lamp sketch with mathematical formulas on chalkboard / blackboard wall background. Intelligence, idea, solution, science and innovation concept
Keywords:
men
education
teaching
text
studying
mathematical symbol
business
ideas
diagram
wisdom
chart
teacher
blackboard
businessman
intelligence
geometry
doodle
science
algebra
student
formula
classroom
mathematics
expertise
physics
professor
solution
learning
light bulb
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