Question

Nosotros mandamos las manzanas a ellos. (2 points)

Answer 1

Nosotros se las mandamos(?)
I don't know what you have to do because you omitted the question, although I have aswered you with direct and indirect objects.

Answer 2

There is no context in how to answer this, so let's write the sentence in the correct way:

Nosotros mandamos las manzanas a ellos.

There is missing a pronoun before the action "mandamos", the subject that is receiving this action is "ellos" in the plural, so the correct pronoun here would be "les"

Nosotros les mandamos las manzanas a ellos.