Ashort essay in english comparing and contrasting expressions of greeting and leave-taking used in spanish-speaking countries and in the united states.

There is a lot of similarities between greetings in the US and in Latin America, as probably the most common greeting is "¿hola, qué tal? " which means "hi, what's up". 
It can actually be "strengthened" into "¿hola, qué tal?¿cómo estás? "- which repeats the question of "how are you" twice in two different ways -in fact, which was the most common greeting I heard in Mexico. 
Some regions in Latin America also have their own, special greeting, for example in Mexico you an also hear ¿qué onda? which is no heard in other places, it literarily means "what a wave"! or "what is the wave bringing" 

Cancer es una de las enfermedades mas comunes en el munde que no tiene curación. poreso muchos sientificos han intentafo años para curar. cancer se puede crear con radiacion o una mutuacion el una celula. poreso los humanos son mad comunes de tener cancer, por las celulas.

The answer is  aevses los amigos de marisol vienen y rompen tu brazo, por hacer trampas. hope this .