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green fluo mathematical calculation on blackboard
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abstract
algebra
and
backgrounds
black
blackboard
calculating
calculation
calculator
calculus
computer
counting
dati
downloading
effect
fluo
fluorescent
formula
geometric
geometry
graphic
green
hacker
hologram
html
intelligence
internet
language
laser
light
mathematical
mathematician
mathematics
messaging
number
online
parentheses
password
pattern
projection
rachida
science
shape
spreadsheet
textured
twodimensional
wallpaper
white
zero