2
albert
black
blackboard
board
calculation
chalk
chalkboard
class
clever
concept
e
education
einstein
emc
energy
equation
exam
formula
genius
handwriting
intelligent
law
learning
lesson
m
mass
math
mathematics
matter
mc
mc2
physics
relativistic
relativity
research
school
science
scientist
simplicity
squared
study
teach
teacher
teaching
text
theory
university
white
written
定額
Relativity equation E mc2 handwritten by chalk on a university blackboard. Science and education concepts and backgroundsの素材 [FY310178010975]
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