Direct test for is_deriv_k
Direct test for is_deriv_k

kaushik94/sympy,aktech/sympy,souravsingh/sympy,chaffra/sympy,chaffra/sympy,jaimahajan1997/sympy,rahuldan/sympy,madan96/sympy,skidzo/sympy,postvakje/sympy,madan96/sympy,yashsharan/sympy,kaushik94/sympy,ChristinaZografou/sympy,souravsingh/sympy,postvakje/sympy,skidzo/sympy,rahuldan/sympy,drufat/sympy,jaimahajan1997/sympy,drufat/sympy,Titan-C/sympy,madan96/sympy,yashsharan/sympy,skidzo/sympy,aktech/sympy,Titan-C/sympy,aktech/sympy,jaimahajan1997/sympy,drufat/sympy,sampadsaha5/sympy,hargup/sympy,ChristinaZografou/sympy,rahuldan/sympy,postvakje/sympy,yashsharan/sympy,chaffra/sympy,ChristinaZografou/sympy,sampadsaha5/sympy,hargup/sympy,souravsingh/sympy,Titan-C/sympy,sampadsaha5/sympy,kaushik94/sympy,hargup/sympy