Package: sympy Version: 0.6.7-1.1 Severity: normal Tags: fixed-upstream import sympy print sympy.__version__ a, b = sympy.symbols(["a", "b"], real=False, commutative=False) print ( (a-b)**2 ).expand(mul=True) print ( (a-b)**3 ).expand(mul=True)
outputs '0.6.7' -a*b - b*a + a**2 + b**2 -a*b - b*a + a**2 + b**2 the result of (a-b)**3 is obviously incorrect. This issue is fixed upstream and outputs the correct result: '0.7.1' -a*b + a**2 - b*a + b**2 -a*b*a + a*b**2 - a**2*b + a**3 + b*a*b - b*a**2 + b**2*a - b**3
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