Arda Guler Thinking

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a young man in a red shirt is standing in front of a blackboard with mathematical equations written on it .
a cheer up sticker with a blue sheep wearing a green hat
a man with glasses and a beard is wearing a plaid shirt and talking in a foreign language .
a man wearing a yellow shirt that says hofmann on it
a man wearing a beanie is making a funny face .
a close up of a yellow cat face on a black background