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 1 - Saving
Make a random, non-repeating vector.
Output any real number that is neither positive nor negative
y equals x divided by 2
How to calculate log?
Replace 0 to NaN!
Print true if
Find x in provided equation!
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