abstract
algebraic
ancient
book
bored
boredom
calculating
calculation
comprehension
concept
drawing
education
faded
formula
handbook
idea
knowledge
learn
material
math
mathematical
mathematics
nobody
old
page
paper
problem
radical
school
schooling
science
sign
study
symbol
table
text
textbook
understanding
white
wood
written
定額
Paper with Mathematical formula attached to the old bookの素材 [FY31019940900]
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