Added beginnings of variation of parameters
Added beginnings of variation of parameters

This technically works, but the wronskian needs to be simplified better.
Also, it hasn't been highly tested yet.

Signed-off-by: Ondrej Certik <b816faa87b7d35274d2e545c5be11ed4376f3ccf@certik.cz>

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