Pythagoras, the greatest mathematician of Ancient Greece, learned Pythagoras' theorem from the locals while travelling in Egypt, where they had been using it for thousands of years.
Fibonacci, the most talented Western mathematician of the Middle Ages, learned the Fibonacci sequence from Indian texts, where it had first been described 1400 years earlier.
Pascal's triangle originated in Persia more than half a millenium before Blaise Pascal was born - in related news, the first known combinatorics solution came even earlier from THE SAME INDIAN GUY who came up with the "Fibonacci" sequence - Pingala, who was also arguably the first person to specifically refer to zero as a number, along with all sorts of other amazing shit, and who I had never heard of until today because my entire education system deemed him too brown to valorise.
It's hard to even imagine how better educated we'd all be without the pernicious brain rot of white supremacism.