function
algebra
blackboard
calculate
calculation
chalk
chalkboard
class
classroom
close up
closeup
college
concept
education
equation
female
formula
hand
happy
help
high
instruction
lecture
lesson
macro
math
mathematical
mathematics
people
person
physics
problem
professor
remedial
research
retro
school
student
study
studying
substitute
success
sunny
teach
teacher
tutor
university
vintage
woman
write
定額
Math teacher writing function, equation or calculation on blackboard in school classroom. Student calculating on chalkboard. Substitute professor working. Tutor giving lesson or lecture.の素材 [FY310141174301]
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