The title and description of this problem have been cleaned up. Also, its test suite has been expanded and improved.
Replace NaNs with the number that appears to its left in the row.
Compute a dot product of two vectors x and y
Solving Quadratic Equations (Version 1)
Find the volume of cone
Convert array of decimal numbers into hexadecimal numbers array.
Find the sines of an isosceles triangle when given its area and height
Compare two strings.
Find product of eigenvalues of n*n magic matrix.
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