This problem has been polished and the test suite expanded and improved.
First N Perfect Squares
Power of n ?
Length of the hypotenuse
Find a Pythagorean triple
Compute LOG(1+X) in natural log
Find hen's weight.
Opposite task convert string hexadecimal numbers array into array of decimal numbers .
Solve expression I
Create a square matrix with given conditions
Find cosine between two given vectors u and v.
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