Replace NaNs with the number that appears to its left in the row.
surface of a spherical planet
Change the sign of even index entries of the reversed vector
Compute Fibonacci Number
Sum of series VII
Draw a '1' in a zero matrix!
Draw a '2' in a zero matrix!
Draw a '3' in a zero matrix!
Sum of series VIII
Find x rows where the sum of the numbers is the maximum
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