modified behaviour of periodicity for functions with negative coeffs
modified behaviour of periodicity for functions with negative coeffs

kaushik94/sympy,souravsingh/sympy,chaffra/sympy,skidzo/sympy,kaushik94/sympy,yashsharan/sympy,postvakje/sympy,aktech/sympy,jaimahajan1997/sympy,drufat/sympy,chaffra/sympy,kaushik94/sympy,aktech/sympy,skidzo/sympy,sampadsaha5/sympy,yashsharan/sympy,chaffra/sympy,postvakje/sympy,postvakje/sympy,skidzo/sympy,souravsingh/sympy,sampadsaha5/sympy,jaimahajan1997/sympy,madan96/sympy,sampadsaha5/sympy,drufat/sympy,drufat/sympy,aktech/sympy,souravsingh/sympy,madan96/sympy,madan96/sympy,jaimahajan1997/sympy,yashsharan/sympy