38 rounds to 40.
29 rounds to 30.
40 x 30 = 120.
-1, -2, 2.
Those are the zeros
Hope this helps
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First simplify the number part, 14/2 = 7/1
then the x part,

y doesn't need to be simplified
then simplify the z part, z^-6 = z^6
put it all together...