arrow
black
blackboard
blue
board
business
businessman
caucasian
chalk
chalkboard
chart
class
clean
close
college
concept
diagram
draw
drawing
education
exponential
graph
graphic
hand
handwriting
holding
horizontal
line
mature
numbers
one
person
pie
red
sales
school
space
student
style
stylish
teach
teacher
text
university
white
work
write
writing
young
定額
A mature hand writing business and different graphs, charts on a clean blackboard with a chalkの素材 [FY31065130048]
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