function
analysis
back
background
black
blackboard
board
chalkboard
class
college
complex
concept
design
doodle
drawing
education
energy
engineering
formula
formulas
graph
graphic
hand
handwritten
illustration
knowledge
learn
lesson
math
number
pattern
physic
physics
school
science
scientific
seamless
sign
sketch
student
study
teach
technical
texture
theory
trigonometry
university
wallpaper
white
writing
定額
Science formula on the blackboard. The study of physics. Hand draws with chalk. Knowledge, study, science concept.の素材 [FY310215364662]
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