What is the difference between twice twenty-two and twice two and -twenty?

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What is the difference between twice twenty-two and twice two and -twenty?

两次二十二和两次二和-二十有何区别

是数学题么?请问是否漏了些标点符号呢?twice two and -twenty 那个and是打多了还是漏了个逗号?
两个二十二 和 两个二的差加上二十是多少?
44-4+20=