Some cleanup to what I have so far in the advanced expression manipulation section
Some cleanup to what I have so far in the advanced expression manipulation section

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