abstract
algebraic
bored
boredom
calculating
calculation
comprehension
concept
crumpled
drawing
education
faded
failure
formula
handbook
idea
knowledge
learn
material
math
mathematical
mathematics
nobody
old
page
paper
problem
radical
school
schooling
science
sign
study
symbol
table
text
understanding
white
wood
written
定額
Crumple paper with Mathematical formulaの素材 [FY31019940925]
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