10-22-2013, 01:34 AM
In CAS, I did the following calculation (typed as is):
diff(x^2+x / x^2+1)
(actually the fraction is a pretty fraction, but this forum editor does not handle that)
[ENTER] provided the result. I wanted to change some parameters in the function, so I highlighted the above and copy-and-pasted into the edit line. The result of pasting it was
x^2+x / (x^2+1)'
The "diff" has been replaced by a prime ' which only operates on the denominator. This is probably a editing glitch that can be easily fix in subsequent upgrades.