This problem has been polished and the test suite expanded and improved.
select the primes of a vector
Pernicious Anniversary Problem
Compute LOG(1+X) in natural log
Square a Number
Multiply two polynomials p and q given in in vector representation.
Opposite task convert string hexadecimal numbers array into array of decimal numbers .
Set x value to each even index of vector y.
Opposite task convert binary numbers array into array of decimal numbers.
Count given word x in text.
Find the sides of an isosceles triangle when given its area and height from its base to apex
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