test case #2 is not correct.
The problem description should be change to "and the sum of non-prime numbers up to the greatest prime lower than x".
Thank you for that clarification, @Rafael S.T. Vieira. The problem title and description have been improved, along with added test cases.
Are all the three given point in the same line?
Make roundn function
Sum two matrices
Calculate Resistance 2
Ratio between sum of primes and sum of factors
Approximate the inverse tangent by power series
Alternate list of elements
Get the value 100
Double the next and alternate sign
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