Just find the number of columns of the given matrix.
x = [1 2
y = 2
Maby this one needs some more test suites ;)
improve test suit
Maybe more test cases here? ;-)
Remove the polynomials that have positive real elements of their roots.
Multiply 2 numbers
Return 'on' or 'off'
Find out total non zero element of matrix
Find the square of the sum of the digits of a number
Convert a number to its Roman representation
Concatenate two strings
Find the area of the four walls
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