I'm too old, I'm a really slow learner, and I study by myself. I've come to enjoy the taste of lemonade.

Please don't leave cryptic comments to my questions if you want to help me. If you don't want to, then simply don't write anything.

Be respectful.

Deo Gratias.

https://math.libretexts.org/

https://topanswers.xyz/

http://lxcenter.di.fc.ul.pt/services/pt/LXServicesConjugatorPT.html