Given n people, everyone must have pictures taken with everyone, each photo includes only two persons, please count the total number of pictures.
middleAsColumn: Return all but first and last element as a column vector
Sum the Digits of a Number
Sum the numbers on the main diagonal
Area of a circle
Filter AC, pass DC
peta to nano (x-ray)
Generate one sample of uniform random numbers between -pi and +pi
Distance walked 3D
old wine in a new bottle?
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