add tests for triangular predicates
add tests for triangular predicates

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