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dreamstime
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buy for Personal Use & Commercial
File Type:
JPG
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adult
background
bad
blackboard
blonde
book
caucasian
education
exam
failed
female
glasses
grade
learn
master
mathematics
maths
mature
note
old
paper
portrait
post
professor
rejection
school
schoolmistress
schoolteacher
severe
study
table
teacher
teaching
tech
test
three
vote
woman
work
write