Note that this problem uses the word solve when it needs to say EVALUATE.
Also the required code to pass the tests shouldn't be available by COPY-AND-PASTE from Test Suite!
Create a vector whose elements depend on the previous element
Count decimal digits of a number
Is this triangle right-angled?
Finding an element in a vector
Solve expression I
Select primes from the matrix.
Compare two strings.
Replace x value into y value in string text.
Calculate roots of polynomial given as vector array.
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