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- i1 : A = QQ[x]
- o1 = A
- o1 : PolynomialRing
- i2 : B = QQ[y]
- o2 = B
- o2 : PolynomialRing
- i3 : C=A**B
- o3 = C
- o3 : PolynomialRing
- i4 : x
- o4 = x
- o4 : C
- i5 : y
- o5 = y
- o5 : C
- i6 : x*y
- o6 = x*y
- o6 : C
- i7 : y*x
- o7 = x*y
- o7 : C
- i8 : x*y == y*x
- o8 = true
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