In mathematics it often happens that the same thing is invented/discovered by different people in almost identical detail. G.H. Hardy recognized the genius of Ramanujan partly because some of his extraordinary and complex formulas had also been discovered by other people.
Mathematics is a complex activity that humans engage in. Clearly many aspects of that are inevitably socially constructed. It is an empirical fact that the content of mathematical knowledge is often independent of the cultural context it occurs in. We might have created math for some purpose, but mathematical knowledge appears to be independent of our access to it.
An advanced alien species might have an entirely different language to describe mathematical knowledge. Our theorems may be obvious trivialities to them, and their theorems incomprehensibly complex to us, but they surely would recognize the Fibonacci numbers.