Экзамены в аспирантуру не были слож

Экзамены в аспирантуру не были сложными для меня, и я смог продемонстрировать все знания, полученные в ВУЗе.

Результаты (английский) 1:

Exams in graduate school were not difficult for me, and I was able to demonstrate all the knowledge gained at University.

Результаты (английский) 2:

Exams to graduate school was not difficult for me, and I was able to demonstrate all the knowledge acquired at the university.

Результаты (английский) 3:

exam in graduate school are not difficult for me, and i was able to demonstrate all the knowledge acquired in school.