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.
Basics: 'Find the eigenvalues of given matrix
kmph to mps
Sum of series IV
multiply by three
Square root of number
Get the value 100
Sum of a geometric series
Ratio between sum of primes and sum of factors
Alternate list of elements
Double the next and alternate sign
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