soft question - An equation that generates a beautiful or unique

Could anyone here provide us an equation that generates a beautiful or unique shape when we plot? For example, this is old but gold, I found this equation on internet: $$ \large\color{blue}{ x^2+

Solved PROBLEM 2 Coca-Cola formula (Point 5) The Coca-Cola

The 9 Most Beautiful Mathematical Equations

Reuleaux triangle - Wikipedia

Eleven Australia Colour IE

Light Reflecting Advanced Skincare Foundation

Pretty Hurts: We tried the new beauty-judging app so you don't have to

Top 10 Most Beautiful Mathematical Equations, by India Soale

Deriving the most Beautiful Equation in Math

Diversity of Life Complete Study Notes, 1005ENV - The Diversity of Life - Griffith

Copper Patina, How to Patina Copper

Concrete Column - Y-Shape, 30 Degrees Dimensions & Drawings

Is the human Y chromosome the only non-X shaped chromosome? What functions or complications are created by the special shape of the Y chromosome? - Quora

Shape (Y)our Future Summit presented by Ice Miller LLP - IndyHub

Cílios Nagaraku em Y Espessura 0.07mm Curvatura C/D

Volume of a Solid of Revolution: Disks and Washers