https://tex.z-dn.net/?f=Media+Aritm%3D+%5Cfrac%7BSumatoria%7D%7BN%7D+%3D+%5Cfrac%7B1%2B2%2B3%2B4%2B5%2B6%2B8%2B...%2B1200%7D%7B30%7D+%3D%C2%A0%5Cfrac%7B3834%7D%7B30%7D+%3D127.8