u simplify your equations like my substitue german g.p.s. teacher lol, kinda complex looking

its me but smarter than b4, okay so basically this is what you actually need in my equation:
distance from mirror and eyes, mph of light/3600, and a few other things. delay = speed, they mean abt the same thing.
.
delay to end of the track = speed until end of the track basically

Just use box method ;-;

Uhh

Well when u shine a laser on it and it reflects, idk what that delay part means tho