One time I was bored translated this formula to work on a TI-83 calculator
The original does work or course but it doesn't look right since the TI-83 isn't as precise as something like Desmos. You have to change the numbers around a bit to make it look right
I wasn't following the image, I was following Desmos's official formula.
The equation works, but since you can't zoom in on TI-83 (or at least I'm not aware you can) you have to scale up the formula to make the symbol appear properly.
Regardless it was a good exercise to mess around with the formulas and see what happens, you're the real winner for having developed a better understanding!