Specific Element Count
Return the first and last character of a string
Number of Horns on a unicorn!
Average of corner elements of a matrix (★★)
Element-wise vector product (★)
Select every other element of a vector (★★)
Approximate functions 2 (★★★★)
Factorize uniquely! (★★)
Create a vector of n alternating ones and minus ones (★★)
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