His rage and frustration 'expressed' [='showed, manifested'] 'themselves' as/in/through temper tantrums.
Her love of nature is 'expressed' [='shown, reflected'] in her paintings/music.
a room where nursing mothers can 'express' [='pump'] milk for their babies
(..) Hey can I ask you somethin'? You look like you'd know. Alright. Which dress do you like better? My top two favs are the ones where they have a half lid stuck to the paper. See, I want something that's going to express my personality... And its ricus. I wanna show off the boobs... Both, nice. (..)2013 TvShow: Orange Is the New Black Title: I Wasn't Ready Season: 1 Episode 1