How to play this situation, with Notation?

[Frankomposer]

Hi Sherry,
Thanks for the explanation, I understand how it works ....
However, I found myself in another situation that, as I have tried to insert upper voices and lower voices, I could not complete the measure
I enclose a picture, so you understand what I mean, the problem is always the Bass Clef, which is full of triplets, and of which I can not distinguish which notes make up the lower voices and what other, the upper voices.
I hope I explained clearly
and above all that you can teach me how to do .....
Thanks again
Franco