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#219829251
The concept of the human brain. The right creative hemisphere versus the left logical hemisphere....
#213524698
Archimedean spiral on white background. Three turnings of one arm of an arithmetic spiral, rotating...
#203446675
Clock face. Measuring circle scale. Measuring round scale, Level indicator, measurement...
#200118693
Blackboard inscribed with scientific formulas and calculations in physics and mathematics.
#214624906
The universe within. Silhouette of a man inside the universe, physical and mathematical formulas.....
#118569932
Normal distribution, also Gaussian distribution or Bell curve. Very common in probability theory....
#239845974
Ruler 100 cm with part to view. Measuring tool. Ruler scale 1 meter. Ruler grid 100 cm. Size...
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