Add tests for integration by parts
Add tests for integration by parts

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