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albert
background
blackboard
calculate
calculation
calculus
chalk
chalkboard
class
classroom
communication
concept
creativity
drawing
education
emc2
empty
energy
equation
figure
formula
frame
genius
handwriting
ideas
intellectual
intelligence
knowledge
learn
lesson
letter
mass
math
mathematical
mathematician
mathematics
message
number
pattern
physics
relativity
school
schoolhouse
science
solution
study
surface
teacher
text
textured
theory
university
writing
定額
Theory of relativity (E=mc2) written on a chalkboardの素材 [FY31033174868]
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