Chalkboard showing handwritten math with sunlight in hallway
Schlüsselwörter
blackboard,
board,
green,
surface,
writing,
frame,
wooden,
handwritten,
smudged,
angled,
corridor,
hallway,
classroom,
interior,
sunlight,
chalky,
white,
dusty,
textured,
warm,
bright,
daytime,
studious,
focused,
unknown,
none,
mathematic,
equation,
algebra,
formula,
variable,
notation,
number,
learning,
graduation,
class,
high school,
graduate,
university
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