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Mixed
Outline
Mayssam
education, Pen, school
Black
512x512
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flipchart, Blackboard, Formula
Glyph
Free Misc Icon Set 1
education, learning, read
Flat
Flat Design Icons (Set 2)
Presentation, teacher, seminar
Lavender
PNG MORE
Office Vol.2
calculate, math, plus
DimGray
Office Vol.3
calculate, math, Minus
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Things
Accounting, calculate, school
RosyBrown
Book, knowledge, education
LightSkyBlue
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ruler, measure, pencil
YellowGreen
bitsies!
bookmark, Book, school
PNG SVG MORE
Cartoon
Monochrome Icon
study, calculator, numbers
478x512
study, math, school
Higher Education Icon Set
mathematics, numbers, school
Gray
256x256
Internet and web
science, Text, education
Pixel
Koloria icons pack
school, Book
SandyBrown
28x32
Smooth
Simplicio
school, Manage
SteelBlue
128x128
3D
Vista Style Base Software
bookmark, diary, Book
Dellipack
homework, math, school
DarkSlateGray