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 8 - Matrix Diagonals
03 - Matrix Variables 3
05 - Vector Equations 2
Let's get back to school, and create multiplication tables
Square root of a number
How to calculate log?
Replace 0 to NaN!
Change matrix to vector
Change matrix to vector2
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