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Molecule of Methanol. Molecular formula: CH4O. Chemical model: Ball and Stick. Isolated. White background. 3D illustration
Molecule: Amoxicillin. Antibiotic. Molecular structure. Formula: C16H19N3O5S. Chemical model: Ball and stick. White background. 3D illustration.
PH balance icon design illustration. Neutral PH balance icon sign, Free acidity concept symbol in color, black and white
Hand drawn math signs on chalk board. Graphic and formula, mathematical, geometric or physic doodle on blackboard, neoteric vector symbols. Mathematical with Thin Line Shapes and Inscriptions Round.

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