Question: How do I use the Maple 'diff'-Command the right way?

Hello everyone,
When I try to calculate the derivative of (cx)/(1+x) in Maple, I get -cx/(1 + x)^2 as the result:

diff(cx/(1 + x), x)
When I do the calculation manually (see attached image), I get c/(1+x)^2 as the result.

Did I use the wrong command in Maple, or how can I explain the different result?

Thanks for your support,
Jan

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