Challenge suggestion: Bezier curves, 2D constructible solid geometry, Voronoi diagram

Bezier curves: I don't have an idea how they could be implemented - looks like a hard challenge

2D CSG: Boolean operations on geometry. Union, Subtraction, Intersection between two shapes that give another single one. Sounds hard, I inspected some code about 3D CSG and it contains clip functions I don't understand but they're the core of the functionality of CSG https://en.wikipedia.org/wiki/Constructive_solid_geometry#Workings

Voronoi Diagram: Uses sweepline which is beyond of my understanding of how it works. Used for many stuff in gamedev, like organic textures synthesis, creating cracks in 3d model, etc..