Knuth&#x27;s up-arrow notation is one of a few ways to address the addition-&gt;multiplication-&gt;exponentiation-&gt;tetration-&gt;... extensions: <a href="https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Knuth%27s_up-arrow_notation" rel="nofollow">https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Knuth%27s_up-arrow_notation</a><p>As for practicalities, the mathematician in me will let the scientists deal with that.