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The city was also the center for trade , which extended to settlements on Mesoamerica 's Gulf Coast . The Maya were one Mesoamerican culture that had strong ties to Teotihuacan . The Maya 's architectural and mathematical contributions were significant . Flourishing from roughly 2000 BCE to 900 CE in what is now Mexico , Belize , Honduras , and Guatemala , the Maya perfected the calendar and written language the Olmec had begun . They devised a written mathematical system to record crop yields and the size of the population , and to assist in trade .
Please check all the words that can be used instead of the target word in the same context. Note that the morphology of the target (third person singular, past tense etc.) is considered to be applied to the candidate automatically in the process of paraphrasing.