Added test for cse of Indexed instances
Added test for cse of Indexed instances

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