# Inspired by Otto Bretscher

**Geometry**Level 3

\[ \large{x(4{\pi}^2y+2{\pi}^2z+3{\pi}^2)=-8(\pi y)^2+y(-2{\pi}^2z-4{\pi}^2)-12{\pi}^2z^2-5{\pi}^2z+36} \]

What kind of surface is this?

\[ \large{x(4{\pi}^2y+2{\pi}^2z+3{\pi}^2)=-8(\pi y)^2+y(-2{\pi}^2z-4{\pi}^2)-12{\pi}^2z^2-5{\pi}^2z+36} \]

What kind of surface is this?

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