Complex sentence: I use primary sources all the time, but I generally include some secondary sources as well, because these are easier for the reader to interpret themselves, plus it provides some background knowledge so they can go read the primary source too.
Split into simpler sentences: I use primary sources all the time, but I generally include some secondary sources as well because these are easier for the reader to interpret themselves. Plus it provides some background knowledge so they can go read the primary source too.