(Short cuts) Addition by subtraction

If you subtract 30 million illegal aliens, and 30 million green card holders, you end up adding more freedom; civility and personal wealth to the citizenry. You also are adding decades, maybe centuries, to the survival of the republic.
https://www.dailymail.co.uk/news/article-14335167/Shaken-migrants-deported-Trump-issue-warning.html