Check if a inputted variable is a number or a string, given a string input (i.e. '1' is 1 and thus a number, 'a' is a string).
Additional test cases have been added.
Union of two set decreasing order
Square the input
Summation of array
Create sequnce 1 4 9 16 25.........
Automatic String Editing
Sum two matrices
Vector indexing: lower than mean
String Delimination and Outputting
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