No.
You may not qualify for Mature Age entry
You cannot use the Mature Age Entry Scheme if you already have any of the following:
a UAI/ATAR score of 70.00 or more from the NSW HSC exam (or equivalent)*
a completed TAFE (or accredited private college)* diploma (or advanced diploma)
a university* attendance record of one or more full-time years (or equivalent)
http://sydney.edu.au/current_studen...tion/admissions/mature_age_entry_scheme.shtml