Replace NaNs with the number that appears to its left in the row.
Return unique values without sorting
Replicate elements in vectors
06 - Matrix Equations 3
Find the sum of n squares
Find sum of negative elements in row.
Opposite task convert string hexadecimal numbers array into array of decimal numbers .
Calculate the sum of elements of n*n Hilbert matrix.
Divide polynomial p1 by p2.
Form a square matrix from four square sub-matrices
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