Strong rule: style --- 3D Pixar ---. 3D Pixar style. A beautiful, clear mathematical formula written on the board: 'x₁,₂ = (-b ± √Д) / 2a'. The professor looks proudly at the formula. Classroom setting, soft sunlight coming from a window.
Character appearance reference (MUST match exactly):
- Профессор Архимед: A friendly, energetic math professor in 3D Pixar style. He has messy white hair, round glasses, a neat beard, wearing a tweed jacket with elbow patches and a bright bow tie. Expressive face, warm smile, animated gestures.
