# Talk:1984 AIME Problems/Problem 7

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The AOPS topic had the formula written as

f(n)= \begin{cases} n-3 & \text{if } n\ge 1000 \\ f(f(n+5)) & \text{if } n<1000 \end{cases}

If you look at this page, you can see about halfway down the page under the heading "Cases and distinctions" that the "\text{if }", which causes a problem in AopsWiki, should be replaced with "\mbox{if }".