Calculate sum of positive elements of the matrix.
Right and wrong
Vectorize the digits of an Integer
Basics: 'Find the eigenvalues of given matrix
Finding an element in a vector
Rotate Matrix @180 degree
Select primes from the matrix.
Calculate the sum of elements of n*n Hilbert matrix.
Find hen's weight.
For given xx,x, y vectors build spline of x and y and find yy values for xx vector.
Solve expression I
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