Formulas and symbols of mathematics drawn with chalk on a green board.
Schlüsselwörter
formula,
symbol,
mathematic,
chalk,
green,
board,
algebra,
geometry,
trig,
calculus,
expression,
function,
graph,
notation,
vector,
diagram,
angle,
fraction,
number,
line,
shape,
coordinate,
root,
quadratic,
limit,
geometric,
sine,
cosine,
tangent
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