Change given string to number. (hint: there is already function)
Changing from ['1234'] to  is one of example
Please expand the test suite so that solutions like this do not work.
Back to basics 14 - Keywords
Doubling elements in a vector
Find the hypotenuse
Tiling a matrix
Length of the hypotenuse
Weighted moving average
Analyze observation data
Calculate some equation
Solve system of equation!
Make roundn function
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