Geometric shape chalk sketches on blackboard, vector education and back to school background. Math formulas, equation, diagrams and proof, circles, squares, spheres and triangles on chalkboard premium vector by Buchandbee

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green sphere triangle vector background circle design shape cube board square formula back cylinder school complex cone drawing education geometric science sketch geometry volume study angle knowledge physics theory scheme mathematics class blackboard algebra proof classroom theorem diagram rhombus chalk calculation math function chalkboard handwritten polygon equation trigonometry back to school

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