See what I mean ?
Trying the OP mentions, once, 'DIFFERENTIAL EQUATIONS'. ETC ETC each of various 'SALAD' words.
NORMALLY, virtually anybody writing, sane, will venture the same word, twice or more, not a single, isolated TECH salad WORD, mentioned once.
Heck, a person could, to supplement the analysis, also count the number of TECH terms given the single mention treatment.
The text in these responses, by analogy, would be a Dance party, where each partner ONLY dances with another partner ONCE, but keeps dancing each round all night, circulating.
NOW,...I'm starting to believe:
'I'm, maybe...A BOT, myself...'