It's all good, I take a much more expansive view of technological development than most people. Regarding algebra, we know very little about precolonial mathem

It's all good, I take a much more expansive view of technological development than most people. Regarding algebra, we know very little about precolonial mathematics. Maya mathematics we've figured out from the calendar system and has zero plus the basic operations. Aztec mathematics seems to have had the same, and we're pretty sure they understood fractions based on how they recorded land area (recording field dimensions) and unit conversions between different length measures. Our knowledge is limited by the very small amount of preservation there was, not because they didn't invent other mathematics. Similarly people in what's not the US had leisure time for things like experimentation, hobbies, and pet birds. We know they had preferences on certain numbers (3 & 4 acted as their equivalents of lucky 7, for example).