Mathematical equations and formulas on open book. Education. Hand-drawn diagrams and graphs isolated on white background. Science. Doodle. Physics. Vector Illustration. Handwriting. premium vector by lulechkay

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white vector background number illustration art board tree black dark formula open symbol concept wall real figure school book education science learn many engineering divide technical engineer count physics theory teach mathematics matrix blackboard plus multiplication minus root calculate subtraction limit math integral adding sum equation derivation scalar derivative cosine

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