basic
bearded
become
blackboard
board
chalkboard
classroom
complex
concept
cone
decorative
draw
drawing
easily
education
engineering
explain
formula
fraction
geometry
glasses
good
graphic
items
learn
length
lesson
man
math
mathematics
mature
middle
modern
physics
protractor
round
ruler
school
school lesson
science
senior
sphere
stem
teacher
teaching
tool
triangle
tutor
use
wide
定額
Maths Problem Solving. senior man teacher use math triangle tool. bearded tutor man at blackboard. back to school. Math science concept with school lesson items. Mathematics at chalkboardの素材 [FY310159992465]
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