surface of a spherical planet
Arrange Vector in descending order
Check if number exists in vector
sum of non-primes
Find cosine between two given vectors u and v.
Convert array of decimal numbers into hexadecimal numbers array.
Pointwise multiplication of vectors.
Opposite task convert string hexadecimal numbers array into array of decimal numbers .
Find sum of negative elements in row.
Find product of eigenvalues of n*n magic matrix.
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