Not much to tell except that I don't know what U+202c means. This is the error: Workspace.Hall.Script:10: Unexpected Unicode character: U+202c and here is my script:

Hall = script.Parent
PrimaryPart = Hall.PrimaryPart
PrimaryPart.Position = Vector3.new(133.875, 0.063, 29.125)
hallClone = Hall:Clone()
hallClone.Parent = game.Workspace
hallClone.Name = "HallClone"
HallCount = 0

function AddHall(count)
	local positionCloneX = 133.875 - count * 112.25
	print(positionCloneX)
	HallClone.PrimaryPart
end

PrimaryPart.Touched:connect(function(hit)
	if hit.Parent == game.Players then
		HallCount = HallCount + 1
		print(HallCount)
		AddHall(HallCount)
	end 
end)

Keep in mind that this script is just a draft and not complete.

I think I do the math wrong, after all I feel really dumb for not knowing this.

Every answer counts! Thank you

Edit: After a little research, I found out that U+202c is -. So, my question has changed: How does one subtract in scripting. I don't want a literal answer, I want it to have a connection with my script.

Your math is incorrect. You need to add parenthesis in order for your program to run. Your options are:

local positionCloneX = (133.875 - count) * 112.25

And

local positionCloneX = 133.875 - (count * 112.25)

I assume you want to use the first option because of how your code was originally formatted. I hope this solves your problem.