Some.2. M.S reputation: the program was amazing but it sadly is not “reputed enough” I guess? Would the program ranking be a factor?
Programs will generally understand just fine.3. Indian undergrad: the fact that undergrad was from India, and the adcom don’t know how to evaluate/translate the grades (even though I have a heavy econ/math) is a concern. I basically have to leave GPA section blank, which makes me lose that "signaling" opportunity (and possibly gives a bad signal instead?)
Explain in SOP and have one of your letter writers document the math.4. Math doesn’t “explicitly” come out from my profile, but I’ve done a lot of it in high school, undergrad and grad school (Real Analysis, Advanced Calculus, Statistics, Probability, Linear Algebra… you name it). How to make Math “pop out” a bit more?