University professor standing at the rostrum in front of blackboard with formulas giving a lecture on quantum physics. Flat style vector illustration isolated on white background premium vector by IconicBestiary

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vector illustration high isolated person sign human people board male man full old formula symbol concept icon doctor school age flat seminar aged education science profession University giving senior physics theory teaching mechanics mathematics teacher professor blackboard classroom chalk scientist lecture academy math podium graduate chalkboard academic rostrum equation lecturing

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