Added Composition and Converting Hypergeometric
Added Composition and Converting Hypergeometric

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