Cuándo usar artículos

Question

"Estoy estudiando [unas temas] con ayuda de profesores experto."

¿Por qué un artículo no se usa con el sustantivo "ayuda" en esta oración?

Answer

Hola Erika
As you can see we accept both options, with and without the article, in that exercise.
When we drop the article we use the noun as if it had a more general meaning without being specific. In this case, not using the article will refer to simply having "help" (some help, general help); whilst using it with the article would make it a bit more specific, referring to that kind of help specifically (from expert teachers).
Saludos