solveset_doc: fix LaTeX rendering
solveset_doc: fix LaTeX rendering

Signed-off-by: Harsh Gupta <c4bd8559369e527b4bb1785ff84e8ff50fde87c0@gmail.com>

lindsayad/sympy,chaffra/sympy,ahhda/sympy,kaushik94/sympy,kaichogami/sympy,Davidjohnwilson/sympy,mafiya69/sympy,aktech/sympy,souravsingh/sympy,yashsharan/sympy,souravsingh/sympy,jerli/sympy,lindsayad/sympy,Shaswat27/sympy,rahuldan/sympy,jaimahajan1997/sympy,drufat/sympy,Arafatk/sympy,hargup/sympy,jerli/sympy,madan96/sympy,jaimahajan1997/sympy,wanglongqi/sympy,ChristinaZografou/sympy,drufat/sympy,Titan-C/sympy,Davidjohnwilson/sympy,wanglongqi/sympy,mcdaniel67/sympy,Titan-C/sympy,yashsharan/sympy,mafiya69/sympy,wanglongqi/sympy,rahuldan/sympy,postvakje/sympy,Arafatk/sympy,madan96/sympy,sampadsaha5/sympy,ahhda/sympy,kaushik94/sympy,Curious72/sympy,ga7g08/sympy,yashsharan/sympy,postvakje/sympy,ChristinaZografou/sympy,Curious72/sympy,jerli/sympy,hargup/sympy,ChristinaZografou/sympy,sampadsaha5/sympy,Shaswat27/sympy,postvakje/sympy,skidzo/sympy,mafiya69/sympy,Davidjohnwilson/sympy,oliverlee/sympy,aktech/sympy,mcdaniel67/sympy,ga7g08/sympy,maniteja123/sympy,aktech/sympy,jaimahajan1997/sympy,rahuldan/sympy,chaffra/sympy,hargup/sympy,oliverlee/sympy,kaushik94/sympy,Titan-C/sympy,ahhda/sympy,skidzo/sympy,sampadsaha5/sympy,maniteja123/sympy,chaffra/sympy,maniteja123/sympy,Curious72/sympy,kaichogami/sympy,souravsingh/sympy,skidzo/sympy,Shaswat27/sympy,Arafatk/sympy,mcdaniel67/sympy,madan96/sympy,ga7g08/sympy,lindsayad/sympy,kaichogami/sympy,drufat/sympy,oliverlee/sympy