dx in calculus is that tiny, beautiful step—it’s a thought, not just a number. And 0/0 limits? You solve them by connecting, like L’Hôpital’s rule or clever algebra, not by memorising a list of standard limits. I regret spending nights mugging up formulas; they only made sense when I saw the harbour waves change gradually, *dx* by *dx*. Now I keep just a couple of patterns in my heart, but I talk to the problem instead.
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