function
art
back
background
banner
billboard
blackboard
blank
board
business
chalk
chalkboard
class
classroom
concept
contour
copy
design
dirty
education
empty
flat
frame
gold
golden
graphic
icon
illustration
isolated
learning
lesson
line
linear
lineart
mathematics
object
old
outline
retro
school
sign
silver
space
study
symbol
template
wood
wooden
write
定額
Black line Chalkboard with function mathematical icon isolated on white background. School Blackboard sign. Silver-gold circle button. Vector Illustrationの素材 [FY310148625696]
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