Strong rule: style --- 3D Pixar ---. 3D Pixar style. A clean, bright shot of the chalkboard. Written in bold, glowing yellow chalk is the formula: 'Д = b² - 4ac'. The professor is pointing at it with a glowing pointer. No English text.
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.
