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.
Is My Wife Wrong?
Replacing a row
Multiply by 3
Replace 0 indices in array with 1's
Simple Vector Addition
Matrix Ax=B problem
Vector Element Multiplication
Automatic String Editing
Sum two matrices
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