Error on my Prime G2

[Quadratica]

Thanks for that info.

Tried it with the decimal point and it worked and then set simplify to minimum and it gave -cos(57) + tan(45)....what oddities.

software is 2.1.12603 (2021)

Just go this calc (long time ti nspire CAS user since 2011!)

Trying to update by using latest firmware and connectivity kit (Windows) but when I run the CK it gives three options:

repair, uninstall, close

tried numerous times with same result. So what now, and is it worth updating, are there any real daily use benefits in having the 2023 version. I do mostly CAS stuff at university level.