A bug in the CAS

[webmasterpdx]

If you hit home mode and copy from cas (menu button), it'll give the correct answer. Now, I'm guessing but in CAS mode, often it's trying to approximate results and like someone earlier said, it's seeing that you are going beyond the 13 digits or whatever and gets a bit confused. However, there are many places where the crossover between home and CAS isn't perfect by far and still has minor bugs. You can usually figure out that it's in error based on the context of your use. If you are doing calculations symbolically, then you need to be in CAS mode, but if you are doing numerical computation where you want answers as accurately as possible, then you need to be in home mode.
This one needs an answer from someone working at HP.