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Mathematic formulas written on a board
Keywords:
education
teaching
high school
concepts
text
studying
adult
hand
child
green color
mathematical symbol
human hand
indoors
caucasian ethnicity
human body part
teacher
back to school
blackboard
trigonometry
lecture hall
chalk drawing
science
visual aid
student
formula
classroom
mathematics
school building
physics
activity
professor
part of
learning
one person
drawing
chalk
art equipment
student aid
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