Do you have any recommendations of books or websites that would teach me mathematical notation. As a developer I work on a wide range of projects from .NET/SQL Server stuff
Good answers already.
You should expect math notation to be hard, because it packs a lot of meaning into very few symbols, so you have to slow down and take it one equation at a time, without any skimming. And usually you have to read a book or article on the general subject.
I knew math professors who said that when they tackled unfamiliar work they had to get some coffee, slow way down, and parse each statement and each equation until they understood it.
I have to use quite a bit of math in my daily work, but it mostly all boils down to high school algebra and trig, plus basic differential calculus, and really basic differential equations and linear algebra. Most people only need the high-school stuff.
Best of luck.