fix typo in math docs
fix typo in math docs

tgunr/factor,mrjbq7/factor,bpollack/factor,Keyholder/factor,sarvex/factor-lang,bjourne/factor,nicolas-p/factor,tgunr/factor,sarvex/factor-lang,mrjbq7/factor,ceninan/factor,mcandre/factor,dch/factor,slavapestov/factor,littledan/Factor,tgunr/factor,slavapestov/factor,slavapestov/factor,ceninan/factor,erg/factor,bpollack/factor,mrjbq7/factor,sarvex/factor-lang,bjourne/factor,sarvex/factor-lang,nicolas-p/factor,ceninan/factor,erg/factor,erg/factor,bjourne/factor,littledan/Factor,tgunr/factor,seckar/factor,mcandre/factor,AlexIljin/factor,mrjbq7/factor,sarvex/factor-lang,AlexIljin/factor,ceninan/factor,bpollack/factor,bpollack/factor,Keyholder/factor,littledan/Factor,dch/factor,nicolas-p/factor,dch/factor,nicolas-p/factor,dch/factor,mrjbq7/factor,AlexIljin/factor,bpollack/factor,bpollack/factor,erg/factor,kingcons/factor,dch/factor,ehird/factor,bpollack/factor,bjourne/factor,mcandre/factor,bjourne/factor,AlexIljin/factor,mcandre/factor,ehird/factor,slavapestov/factor,erg/factor,cataska/factor,erg/factor,mcandre/factor,seckar/factor,factor/factor,cataska/factor,factor/factor,cataska/factor,sarvex/factor-lang,erg/factor,bjourne/factor,Keyholder/factor,AlexIljin/factor,AlexIljin/factor,nicolas-p/factor,tgunr/factor,sarvex/factor-lang,littledan/Factor,mcandre/factor,kingcons/factor,factor/factor,kingcons/factor,factor/factor,nicolas-p/factor,factor/factor,slavapestov/factor,nicolas-p/factor,AlexIljin/factor,tgunr/factor,kingcons/factor,cataska/factor,slavapestov/factor,seckar/factor,slavapestov/factor,bjourne/factor,dch/factor,mrjbq7/factor,ehird/factor,factor/factor,mcandre/factor