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6y-y3 = 3
-y3 + 7y3
x3-y3
y^3
27-y3 factored completely = 24
72
X2+Y3+15 All you can do is simplify it.
y times y times y (or y3)
30
12x2 - 24x + 9y
The GCF of y3, y7, y8 is y3