If you want to learn decent undergrad math you really dont even need that much. 1yr analysis, 1yr algebra, topology. Then maybe a combination of a more indepth linear algebra course, an optimization course, a probability course, a stats course. You could probably do all that and a few more electives in one year full time.

From what I've heard from some foreign students, the 400 level American undergrad courses are what they are expected to learn as freshmen.