The title and description of this problem have been cleaned up. Also, its test suite has been expanded and improved.
Reverse the vector
Get the elements of diagonal and antidiagonal for any m-by-n matrix
Is it a number?
Matlab Basics II - Count rows in a matrix
Select primes from the matrix.
Count given word x in text.
Solve expression I
Opposite task convert string hexadecimal numbers array into array of decimal numbers .
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