25 - ⁵/₅ = 25 - 1 = 24

If you wrote it vertically:

25 - 5
————— = 4
5

But once you lay it out on one line, you have to use prins to prioritize addition / subtraction:

(25 - 5) / 5 = 20 / 5 = 4

Some YouTube mathematicians deep-dive into this.

ETA: Nothing goes over my head! My reflexes are too fast, I would catch it.