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
(..) Upstairs, downstairs. How do you like that? Lady! What is wrong with you? Get a grip on yourselves, people. You're a bad kitty. Dagnabbit! I missed the express. Looks like I'll have to take the Stamford local. I got him! I've got him! He's got him! He's got him! He's got him! He's got... (..)2005 Madagascar