Profession Stock Photos: caucasian man smiling

Laughing mature professor standing with his hands folded and eyeglasses off
Laughing old professor holding small blackboard
Mature professor laughing hard about something
Thinking about all these work things
When science work's been just great
Male clown with cake cream on his face holding a cake
Laughing old professor holding a small blackboard
Male clown with cake cream on his face holding a cake
Serious looking old professor with eyeglasses on head and hands folded
Excited mature professor adjusting eyeglasses
Laughing old professor with his eyeglasses on his head
Mature professor with eyeglasses off and hands folded giggling
Serious looking old professor holding small blackboard
Male clown with cake cream on his face holding a cake
Male clown holding a white cake
Male clown with cake cream on his face holding a cake
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