甚至还可以在复合命令内执行算术测试，但是千万要小心。
You can even do arithmetic tests within compounds, but be careful.
在我6岁的儿子第一个春节前后的寒假期间，他拿到42页的算术和42页的语文功课，要在4周内完成。
For his first Chinese New year semester break, my 6-year-old son was given 42 pages of math and 42 pages of Chinese homework to complete in four weeks.
我该如何避免这种情况，所以我可以以小时和分钟超过24小时内做简单的算术题吗？
How can I avoid this, so that I can do simple arithmetic with hours and minutes exceeding a 24 hour period?
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