Return how many integer grid points there are inside a 3D sphere of radius r centred at (0,0,0) (including points on the edge).
Neither string operations nor interpolations are allowed!
Remove all the consonants
Sort a list of complex numbers based on far they are from the origin.
Choose the best fitting dominoes
Sum of series I
Radial Zernike polynomials
Shifted Hexagonal Tiling Dots in a Circle
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