adhd
attention
background
brilliant
caucasian
chalkboard
child
childhood
class
classroom
clever
common
core
cosinus
cute
deficit
difficult
education
equation
genius
girl
hard
homework
integral
kid
learning
looking
math
person
portrait
problem
pupil
school
sinus
smart
solve
student
study
studying
task
thinking
tired
white
work
young
定額
Small schoolgirl trying to solve an integral equation but it is too difficult for her so she only standing in front of the chalkboard and thinking.の素材 [FY31060178600]
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