replace ``plot`` with the new functions
replace ``plot`` with the new functions

* Also removed the ``nsolve`` example which was failing.

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