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Brilliant Young Mathematician Is Writing on Big Blackboard and Thinking about Solving Long and Complex Equation/ Formula.
People never giving up, strength and power. Man feeling determined standing on a mountainside flexing.
Senior couple laughing and having fun in autumn park. After all these years as at the first meeting
Skilled worker using equipment in a professional factory environment
Pensioner breathing heavily after training physical activity elderly man dyspnea sporty athlete sportsman recreation stadium city outside vitality health hard working intense cardiovascular exhausted

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