This task is about translating a given English language sentence to Spanish.

This is called the Feynman path integral, and this just says, sum up over all the paths and calculate something that will tell you the probability of an electron going from one place to another.
Esto se llama la integral de la trayectoria de Feynman, y esto sólo dice: suma todas las rayectorias calcula algo que le indicará la probabilidad de un electrón vaya de un lugar a otro.