Fix try_polynomial: case func.ap has several non-positive parameters
Fix try_polynomial: case func.ap has several non-positive parameters

For example, hyper((-2, -3), (-2,), z) != oo:

    In[7]:= HypergeometricPFQ[{-2, -3}, {-2}, z]
    Out[7]=
                 2
    1 - 3 z + 3 z

kaushik94/sympy,kaushik94/sympy,kaushik94/sympy