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
sum of non-primes
Area of a Square
Product of elements in row
Make roundn function
Where is 1?
Solve equation numerically
Print true if
Change matrix to vector2
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