function
algebra
background
blackboard
board
book
calculate
class
classroom
closeup
college
complex
design
desk
educate
education
equation
exam
formula
geometry
handwriting
laboratory
math
mathematical
mathematics
minus
note
notebook
numbers
pattern
pen
physics
plus
proof
research
ruler
school
science
sign
solution
student
study
studying
symbol
table
teach
university
white
write
writing
定額
mathematical formulas on notebooks, trigonometry and geometric shapesの素材 [FY310127130422]
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