Add tests from issues 1423, 2630 and 3328.
Add tests from issues 1423, 2630 and 3328.

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