realizó

third-person singular preterite indicative of realizar

tareas

plural of tarea

de

• Noun

  The name of the Latin-script letter D/d.

• Prep

docencia

teaching, tutoring

en

1. in, at, on
2. in (a time)
3. in (a language)
4. used after some verbs and translated by various prepositions in English
5. in (in various expressions)

varias

feminine plural of vario

universidades

plural of universidad