Additional test cases have been added.
Verify you 7th Test Suite.
Replace NaNs with the number that appears to its left in the row.
Replace May with April
Given a matrix, swap the 2nd & 3rd columns
Return area of square
Flip the bit
Find the index of n in magic(n)
Sum of odd numbers in a matrix
Alternately upper-lower case
index of n^2 in magic(n)
union without repitition
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