Math theory and mathematical formula equation doodle handwriting icon in white isolated background with hand drawn model used for school education and document decoration, create by vector - stock vector
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60 Vintage Science Vectors by MouseMade | The Comprehensive, Creative Vectors Bundle Mar 2015 from Design Cuts
Hand drawn science beautiful vintage lab icons sketch set . Vector illustration. Back to School. Doodle, equipment. Line art aged paper. Biology, geology, alchemy, chemistry, magic. Tattoo elements.