piecewise: Added tests for integrate and solve
piecewise: Added tests for integrate and solve

oliverlee/sympy,shikil/sympy,amitjamadagni/sympy,vipulroxx/sympy,kmacinnis/sympy,VaibhavAgarwalVA/sympy,AkademieOlympia/sympy,minrk/sympy,jbbskinny/sympy,Curious72/sympy,MechCoder/sympy,yukoba/sympy,liangjiaxing/sympy,Mitchkoens/sympy,flacjacket/sympy,meghana1995/sympy,Titan-C/sympy,abhiii5459/sympy,dqnykamp/sympy,kmacinnis/sympy,cswiercz/sympy,kaichogami/sympy,iamutkarshtiwari/sympy,rahuldan/sympy,pandeyadarsh/sympy,liangjiaxing/sympy,Mitchkoens/sympy,shipci/sympy,Arafatk/sympy,Davidjohnwilson/sympy,chaffra/sympy,AunShiLord/sympy,bukzor/sympy,Shaswat27/sympy,iamutkarshtiwari/sympy,drufat/sympy,lindsayad/sympy,kumarkrishna/sympy,abloomston/sympy,minrk/sympy,aktech/sympy,hrashk/sympy,MechCoder/sympy,skidzo/sympy,jaimahajan1997/sympy,atreyv/sympy,Designist/sympy,asm666/sympy,bukzor/sympy,maniteja123/sympy,kevalds51/sympy,grevutiu-gabriel/sympy,pandeyadarsh/sympy,saurabhjn76/sympy,farhaanbukhsh/sympy,ChristinaZografou/sympy,jamesblunt/sympy,souravsingh/sympy,lidavidm/sympy,ChristinaZografou/sympy,Arafatk/sympy,VaibhavAgarwalVA/sympy,MridulS/sympy,beni55/sympy,hargup/sympy,cswiercz/sympy,MridulS/sympy,Vishluck/sympy,toolforger/sympy,lindsayad/sympy,kaushik94/sympy,kumarkrishna/sympy,mafiya69/sympy,maniteja123/sympy,hargup/sympy,postvakje/sympy,kevalds51/sympy,moble/sympy,farhaanbukhsh/sympy,ga7g08/sympy,sampadsaha5/sympy,emon10005/sympy,abloomston/sympy,mafiya69/sympy,sunny94/temp,jerli/sympy,kumarkrishna/sympy,Vishluck/sympy,skidzo/sympy,meghana1995/sympy,wanglongqi/sympy,asm666/sympy,pernici/sympy,postvakje/sympy,liangjiaxing/sympy,jaimahajan1997/sympy,lidavidm/sympy,rahuldan/sympy,amitjamadagni/sympy,kmacinnis/sympy,kevalds51/sympy,sahmed95/sympy,sahilshekhawat/sympy,cswiercz/sympy,ga7g08/sympy,garvitr/sympy,mcdaniel67/sympy,Gadal/sympy,madan96/sympy,kaichogami/sympy,ga7g08/sympy,ChristinaZografou/sympy,cccfran/sympy,sunny94/temp,mcdaniel67/sympy,Davidjohnwilson/sympy,MechCoder/sympy,jamesblunt/sympy,sampadsaha5/sympy,diofant/diofant,madan96/sympy,emon10005/sympy,debugger22/sympy,Shaswat27/sympy,Gadal/sympy,kaushik94/sympy,drufat/sympy,shikil/sympy,rahuldan/sympy,vipulroxx/sympy,abhiii5459/sympy,skidzo/sympy,jbbskinny/sympy,emon10005/sympy,souravsingh/sympy,garvitr/sympy,toolforger/sympy,VaibhavAgarwalVA/sympy,kaushik94/sympy,Designist/sympy,shikil/sympy,Curious72/sympy,hrashk/sympy,Curious72/sympy,Davidjohnwilson/sympy,AunShiLord/sympy,jaimahajan1997/sympy,sahmed95/sympy,chaffra/sympy,srjoglekar246/sympy,yukoba/sympy,atsao72/sympy,shipci/sympy,pbrady/sympy,MridulS/sympy,Arafatk/sympy,atsao72/sympy,Gadal/sympy,atsao72/sympy,jamesblunt/sympy,iamutkarshtiwari/sympy,mcdaniel67/sympy,beni55/sympy,madan96/sympy,Shaswat27/sympy,hargup/sympy,tovrstra/sympy,meghana1995/sympy,garvitr/sympy,pbrady/sympy,Designist/sympy,AunShiLord/sympy,kaichogami/sympy,shipci/sympy,AkademieOlympia/sympy,lindsayad/sympy,ahhda/sympy,atreyv/sympy,jerli/sympy,Sumith1896/sympy,yashsharan/sympy,pandeyadarsh/sympy,maniteja123/sympy,Sumith1896/sympy,wyom/sympy,toolforger/sympy,moble/sympy,cccfran/sympy,moble/sympy,souravsingh/sympy,abhiii5459/sympy,ahhda/sympy,sunny94/temp,cccfran/sympy,wanglongqi/sympy,yashsharan/sympy,lidavidm/sympy,Titan-C/sympy,sahilshekhawat/sympy,mafiya69/sympy,asm666/sympy,sahilshekhawat/sympy,vipulroxx/sympy,yashsharan/sympy,Mitchkoens/sympy,Sumith1896/sympy,yukoba/sympy,beni55/sympy,oliverlee/sympy,aktech/sympy,mattpap/sympy-polys,jbbskinny/sympy,grevutiu-gabriel/sympy,hrashk/sympy,grevutiu-gabriel/sympy,abloomston/sympy,saurabhjn76/sympy,pbrady/sympy,drufat/sympy,sampadsaha5/sympy,sahmed95/sympy,atreyv/sympy,wyom/sympy,wanglongqi/sympy,AkademieOlympia/sympy,debugger22/sympy,jerli/sympy,farhaanbukhsh/sympy,aktech/sympy,oliverlee/sympy,dqnykamp/sympy,dqnykamp/sympy,bukzor/sympy,chaffra/sympy,saurabhjn76/sympy,postvakje/sympy,wyom/sympy,Titan-C/sympy,Vishluck/sympy,fperez/sympy,skirpichev/omg,debugger22/sympy,ahhda/sympy