Create a humorous mathematics image of a chalkboard with a man talking to students. The image is set in a classroom with the man standing in front of a large, green chalkboard. He is middle-aged, wearing a light blue shirt, brown pants, and a pair of square glasses. He holds a piece of chalk in his right hand and is in the process of writing a complex algebraic equation on the board: x^2 + y^2 = z^2. A bubble speech near his mouth shows him saying in a comic way, "And that, students, is why we don't let Pythagoras join our parties!"
Facing him are several desks filled with diverse students, each with a look of varied amusement or confusion.
