This problem has been polished and the test suite expanded and improved.
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Sum of first n positive integers
02 - Vector Variables 4
Create sequnce 1 4 9 16 25.........
Find hen's weight.
Calculate the sum of elements of n*n Hilbert matrix.
Find sum of negative elements in row.
Select primes from the matrix.
For given xx,x, y vectors build spline of x and y and find yy values for xx vector.
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