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Nauczyciel lub student piszący na tablicy podczas lekcji matematyki w klasie szkolnej.

$Nauczyciel lub student piszący na tablicy podczas lekcji matematyki w klasie szkolnej. - Zdjęcie, obraz$

Nauczyciel lub student piszący na tablicy podczas lekcji matematyki w klasie szkolnej. - Zdjęcie stockowe & obraz

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