Hi guys. I'm trying to identify 2 types of trees. I am located in Australia.
The first 2 pics are one tree and the second 2 picks are the second tree.
Thanks in advance.

Tree #1... I can't tell if the leaf/branch arrangement is alternate or opposite. In N. America I would say it is either a Pecan (alternate leaves) or an Ash species (opposite leaves) perhaps a Raywood Ash. Being in Aust. it may be something completely different.

#2 looks like a Locust tree (Robinia sp.) but again, being in Aust it may be an Acacia.

Rereading my reply I was no help at all

first 2 pics look like a pistachio ...