Additional test cases have been added.
two steps in one op, nicely done!
Replace NaNs with the number that appears to its left in the row.
Compute a dot product of two vectors x and y
Output any real number that is neither positive nor negative
Is the input divisible by 3?
Remove the first, third and fifth rows of a matrix
Vertical matrix sort
Approximate the cosine function
How many days in a month?
Sum of adjacent elements in a vector
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