Function in Python Beginner

Function in Python Beginner
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Why are they equal?Help,please

you are asking a lot of questions out of context
please use the appropriate subforum, we have a subforum for #python
and please provide context for your questions
it is impossible to answer you like this
what is equal to what?

it is just making the sum inside the function

Please ,do not answer on my questions,when u see my nick,just ignore the questions,please.