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
(..) delicious bastards? Where are you? - False advertising! - Jesus Christ. - You want a Sno-Ball or something? - Oh God! Words cannot express.. - It's too soon. - Do you think you can, maybe, just pick out the Buckshot and just kind of eat around it? - No! No! (..)2009 Zombieland