Physical seamless pattern with the equations, figures, schemes, plots and other calculations on blackboard. Handwritten vector Illustration. Vintage education background. premium vector by dr1proekt.gmail.com

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white vector background number illustration sign natural board black formula symbol expression concept school complex writing wallpaper drawing education artwork lab laboratory science problem solution sketch geometry college University technical knowledge physics mathematics handwriting parabolic blackboard mathematical algebra proof multiplication chalk calculation math task function chalkboard equation shuffle trigonometry seamless pattern

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