Answer:
Dale los fósforos, por favor
Dáselos, por favor
Step-by-step explanation:
Dale los fósforos, por favor. (give her the matches please)
Dáselos, por favor. (give it to them please)
"No se los dé por favor." express the opposite to the second sentence, asking you not to give it to them
"Se los das." expresses a fact, which is going to give the matches, but in a more imperative and less friendly way.