Do operation as per given string
Example: '3*5' then answer must be 15;
'3+5' then answer must be 8;
'35' then answer must be 35;
surface of a spherical planet
Multiply a column by a row
Replace Vector Elements
Find the index of n in magic(n)
Is it column vector?
Append two matrix as shown below example
Check transmitted data follow even parity (True or false)
Convert decimal to hex as shown in test cases
Find out total non zero element of matrix
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