I'm not sure I fully understand the question.
If you're wanting to take your maths knowledge to the next level, then apply to college for the most appropriate course.
I might be out of date with the nomenclature, but if say you've got an A level in maths, then the next step would be to take A level further maths??
What maths qualifications do you have at the mo ??
'Advanced' would mean 'A' level here. Think you're probably American because you use 'math' instead of the correct 'maths'. Unlikely anyone here can help you. Ask a Maths. teacher - even just go into a school and ask. If you are over school age, ask at a college.