I am writing a college admissions essay and would like to get a professional opinion on whether it is acceptable to use the truncated and informal version of the word "mathematics" as "math". I ask this because my essay contains the word "mathematics" about fifteen or so times and would like to cut down on repetitiveness by using various versions of the word. I have included the word "maths" appropriately in my essay because I address my usage of it.
I think it is a creative idea (I think it might be a literary technique - don't know for sure, rusty English skills) to use all of "mathematics", "maths", and "math" in my essay but just want to make sure so I don't seem foolish!
Please add appropriate tags for this question. I am new to this SE site and am not familiar with the tags.