Vocabulary consisting only from characters you are able to read
早引け
はやびけ
leaving work (office, school) earlysuru
結婚生活
けっこんせいかつ
wedded life, married lifemix
表現
ひょうげん
(1)expression, presentation, (2)(math) representation, notation suru
老人
ろうじん
the aged/old person/(P)jlpt3
最大化
さいだいか
maximization, maximisationsuru