I couldn't figure out why my numbers were larger than the answers in the test suite and finally realized that most of those answers were products of the unique factors of the numbers of permutations.
Tic Tac Toe FTW
Figurate number triangle
Multiply a column by a row
The Answer to Life, the Universe, and Everything
Determine whether a given point is inside or outside a polygon
Raise a polynomial to a power
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