Answered
Hallo,
geogebra simplifies double fraction within specific conditions wrong.
I attached a file which demonstrates the problem, the simplification from line 11 to line 12 in cas window is wrong.
The double fraction is simplified wrong, probably becaus of missing parentheses.
It was tested with recent geogebra 5.0.42.
Please fix this mathematical problem.
Thank you.
Bye,
Frank Schütte
The same problem 
Thanks for the report, we will look into it: https://jira.geogebra.org/b...
Cheers,
Zbynek
Please try 5.0.59.0
Hallo,
this version works like expected.
Thank you for this quick fix.
Bye,
Frank
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