Math
Palabras clave
mathematic,
board,
blackboard,
mathematician,
chalk,
class,
vignetting,
studying,
blackboard,
green,
mathematic,
triangle,
formula,
geometry,
study,
write,
lesson,
shape,
learn,
theorem,
illustration,
geometric,
scientific,
equality,
painted,
research,
equation,
famous,
science,
school,
instructing,
university,
education,
background,
angle,
pattern,
pythagoras
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