0:13 Mistake: n-(10^10^10^56-3) more than n-(10^10^10^56), since the values are added, but decreasing the subtracted (since n is minuend). 3:02 Note: ∞ = n = n+0 = (-1/12)(As an erroneous sum of all natural numbers) = (0/0)(But: you can't divide by zero)
Not as a letter designation, but as ATE(discontinued in 2019) successor. It is quite possible to use (-1/12)(The sum of all natural numbers, according to the theory of the same name) era. But it will be harder there, since not everyone will understand why exactly (-1/12), and not (0/0) or (1/0).