grammar - two and's when using "between"

I'm writing an introduction part for my research paper. I wrote a sentence that follows:

"The main concern of this study is to find out whether there is a relationship between gender and success and interest for different disciplines taught in the FLE department of METU"

In the sentence, I want to mean "gender" as being one part and "success and interest" being the other part. If I use two ands like this, it creates an ambiguity. How can I rewrite this?