Specific Element Count
Matrix indexing with two vectors of indices
Find a Pythagorean triple
Union of two set decreasing order
Variance computation (★)
Matrix indexing with two vectors of indices (★★)
Get the elements of diagonal and antidiagonal for any m-by-n matrix (★★★★)
Mo money, mo math #2! (★★★)
Approximate functions 2 (★★★★)
Sum of terms in a series 2 (★★★)
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