[spec] Test all aspects of Math module (#3683)
[spec] Test all aspects of Math module (#3683)


houqp/koreader,pazos/koreader,poire-z/koreader,lgeek/koreader,koreader/koreader,Frenzie/koreader,poire-z/koreader,NiLuJe/koreader,mihailim/koreader,mwoz123/koreader,Frenzie/koreader,Hzj-jie/koreader,Markismus/koreader,NiLuJe/koreader,koreader/koreader