What are you looking for? Do you want it to increase by the same amount each level or do you want it to increase by more each time. Something like this would increase the amount by more and more each time.
Also there is no need to check if the Exp.Value == MaxExp.Value, if they are equal then the first if statement will just set the exp to 0 anyway.
Exp:GetPropertyChangedSignal("Value"):Connect(function()
local formulate = math.floor((Level.Value)^1.1 * 100) * 5
MaxExp.Value = formulate
if Exp.Value > MaxExp.Value then
local getRemaining = Exp.Value - MaxExp.Value
Level.Value += 1
Exp.Value = getRemaining
end
end)