How can I calculate the number of $4$-vertex convex polygons (quadrilaterals) that can be formed out of $n$ given points, where $n \geq 4$?
Note: Points can be collinear. So triangles with $3$ sides but $4$ vertices are also allowed.
2026-03-29 04:10:49.1774757449
Number of quadrilaterals formed out of N points.
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