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.
give nth decimal place of pi
Back to basics 9 - Indexed References
Create matrix of replicated elements
Find out value of sine given by degree.
Determine point is located in a circle or not
Change matrix to vector
Solve the system of linear equations
Calculate some equation
Replace 0 to NaN!
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