You can ask FriCAS to show latex output. In particular, this can be used for complex output.
(1/2)::TEX
["$$","\frac{1}{2} ","$$"]
(1/(x+5))::TEX
["$$","\frac{1}{{x+5}} ","$$"]
((x+3)/(y-5))::TEX
["$$","\frac{{x+3}}{{y -5}} ","$$"]
We can change the fraction display so it is horizontal:
)set output fraction horizontal
(1/2)::TEX
["$$","SLASH ","\left(","{1, \: 2} ","\right)","$$"]
(1/(x+5))::TEX
["$$","SLASH ","\left(","{1, \: {x+5}} ","\right)","$$"]
((x+3)/(y-5))::TEX
["$$","SLASH ","\left(","{{x+3}, \: {y -5}} ","\right)","$$"]
See Also: