Определите, к каким частям речи относятся следующие слова mathematics, mathematician; practice, practical, practi-
cally; invent, inventor, invention; nature, natural; to equip,
equipment; to write, a writer; to work, works, worker;
discuss, discussion; high, height; scientist, science, scien-
tific; construct, construction; contain, container; recom-
mend, recommendation; special, speciality, specialist: de-
scribe, description, descriptive

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