The point of interest is +{c}*{power_c}*x^({power_c-1}) in variable df1. The multiplication between {c} and {power_c} is removed, leading to incorrect expression.
EDIT:
I could reproduce it in a simpler case now. Bug is triggered when using "basic" simplification rules, rather than "all".
The simplification rule in some cases concatenates substituted values, removing multiplication sign "*".
Example question.
The point of interest is
+{c}*{power_c}*x^({power_c-1})in variabledf1. The multiplication between{c}and{power_c}is removed, leading to incorrect expression.EDIT: I could reproduce it in a simpler case now. Bug is triggered when using "basic" simplification rules, rather than "all".