auditorium
back
background
blackboard
board
business
calculus
caucasian
chalk
chalkboard
class
classroom
clever
college
compute
conceptual
course
education
equation
exam
exercise
fail
forget
formula
frustrated
head
intelligent
knowledge
learn
lecture
lecturer
mathematics
meditate
people
practice
problem
professor
proof
research
room
scholar
school
schooling
science
scientist
seminar
student
teacher
test
university
定額
Business person standing against the blackboard with a lot of data written on itの素材 [FY31016884637]
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