Honestly, there's no need to worry about it...I promise! I hadn't had a math class in 6 years when I took the TEAS and got an 89 on the math portion. My advice is to just review the concepts up to Algebra II, definitely get the official study guide book for the TEAS, as that helps out a lot and I'd also recommend using the site Khan's Academy and they explain the math concepts in easily digestible videos and practice problems - that site also has many other subjects, so you can review some sciences if you need to as well. Best of luck, don't fret about it :)