added tests
added tests

saurabhjn76/sympy,mafiya69/sympy,beni55/sympy,aktech/sympy,Vishluck/sympy,kevalds51/sympy,oliverlee/sympy,ga7g08/sympy,maniteja123/sympy,sampadsaha5/sympy,lidavidm/sympy,oliverlee/sympy,sahilshekhawat/sympy,abloomston/sympy,abhiii5459/sympy,Davidjohnwilson/sympy,sahmed95/sympy,Vishluck/sympy,diofant/diofant,wanglongqi/sympy,shipci/sympy,AunShiLord/sympy,souravsingh/sympy,mcdaniel67/sympy,kaushik94/sympy,kaushik94/sympy,jbbskinny/sympy,lidavidm/sympy,ChristinaZografou/sympy,Gadal/sympy,chaffra/sympy,drufat/sympy,grevutiu-gabriel/sympy,hrashk/sympy,Designist/sympy,yukoba/sympy,atreyv/sympy,asm666/sympy,chaffra/sympy,Sumith1896/sympy,grevutiu-gabriel/sympy,aktech/sympy,kmacinnis/sympy,shipci/sympy,MridulS/sympy,Mitchkoens/sympy,skidzo/sympy,Davidjohnwilson/sympy,Curious72/sympy,Titan-C/sympy,abloomston/sympy,toolforger/sympy,kmacinnis/sympy,sahmed95/sympy,toolforger/sympy,ga7g08/sympy,yukoba/sympy,drufat/sympy,jerli/sympy,madan96/sympy,VaibhavAgarwalVA/sympy,madan96/sympy,pbrady/sympy,shikil/sympy,meghana1995/sympy,yashsharan/sympy,Mitchkoens/sympy,cccfran/sympy,kmacinnis/sympy,Gadal/sympy,vipulroxx/sympy,Sumith1896/sympy,asm666/sympy,chaffra/sympy,jaimahajan1997/sympy,yukoba/sympy,yashsharan/sympy,shikil/sympy,postvakje/sympy,cccfran/sympy,cswiercz/sympy,MridulS/sympy,jerli/sympy,jamesblunt/sympy,sampadsaha5/sympy,jbbskinny/sympy,pbrady/sympy,meghana1995/sympy,Shaswat27/sympy,Titan-C/sympy,garvitr/sympy,maniteja123/sympy,yashsharan/sympy,garvitr/sympy,MechCoder/sympy,atsao72/sympy,skidzo/sympy,hargup/sympy,AunShiLord/sympy,pandeyadarsh/sympy,ChristinaZografou/sympy,sunny94/temp,pandeyadarsh/sympy,asm666/sympy,debugger22/sympy,MechCoder/sympy,iamutkarshtiwari/sympy,Designist/sympy,postvakje/sympy,meghana1995/sympy,iamutkarshtiwari/sympy,kumarkrishna/sympy,wyom/sympy,Arafatk/sympy,liangjiaxing/sympy,garvitr/sympy,jerli/sympy,amitjamadagni/sympy,Designist/sympy,wyom/sympy,wanglongqi/sympy,Sumith1896/sympy,shipci/sympy,aktech/sympy,rahuldan/sympy,skidzo/sympy,liangjiaxing/sympy,vipulroxx/sympy,farhaanbukhsh/sympy,jbbskinny/sympy,mcdaniel67/sympy,cswiercz/sympy,Arafatk/sympy,ga7g08/sympy,madan96/sympy,saurabhjn76/sympy,beni55/sympy,kumarkrishna/sympy,pbrady/sympy,jaimahajan1997/sympy,abloomston/sympy,emon10005/sympy,jaimahajan1997/sympy,atreyv/sympy,abhiii5459/sympy,postvakje/sympy,lindsayad/sympy,souravsingh/sympy,beni55/sympy,skirpichev/omg,mafiya69/sympy,atreyv/sympy,saurabhjn76/sympy,Mitchkoens/sympy,atsao72/sympy,VaibhavAgarwalVA/sympy,hargup/sympy,Curious72/sympy,kevalds51/sympy,dqnykamp/sympy,ahhda/sympy,sahmed95/sympy,atsao72/sympy,MridulS/sympy,cswiercz/sympy,MechCoder/sympy,Shaswat27/sympy,rahuldan/sympy,jamesblunt/sympy,AkademieOlympia/sympy,sunny94/temp,amitjamadagni/sympy,hargup/sympy,sampadsaha5/sympy,farhaanbukhsh/sympy,moble/sympy,bukzor/sympy,Arafatk/sympy,dqnykamp/sympy,kaushik94/sympy,sahilshekhawat/sympy,lindsayad/sympy,iamutkarshtiwari/sympy,moble/sympy,wanglongqi/sympy,Gadal/sympy,ahhda/sympy,wyom/sympy,lidavidm/sympy,drufat/sympy,sahilshekhawat/sympy,moble/sympy,mafiya69/sympy,AunShiLord/sympy,Davidjohnwilson/sympy,lindsayad/sympy,oliverlee/sympy,jamesblunt/sympy,ahhda/sympy,grevutiu-gabriel/sympy,kevalds51/sympy,pandeyadarsh/sympy,dqnykamp/sympy,souravsingh/sympy,hrashk/sympy,ChristinaZografou/sympy,Shaswat27/sympy,rahuldan/sympy,kumarkrishna/sympy,AkademieOlympia/sympy,bukzor/sympy,farhaanbukhsh/sympy,mcdaniel67/sympy,kaichogami/sympy,toolforger/sympy,emon10005/sympy,maniteja123/sympy,shikil/sympy,abhiii5459/sympy,Vishluck/sympy,liangjiaxing/sympy,VaibhavAgarwalVA/sympy,hrashk/sympy,vipulroxx/sympy,AkademieOlympia/sympy,debugger22/sympy,cccfran/sympy,Curious72/sympy,bukzor/sympy,sunny94/temp,kaichogami/sympy,debugger22/sympy,Titan-C/sympy,emon10005/sympy,kaichogami/sympy