三减二是一。
三减一等于二。
Now, what I know is a sum of two squared minus one.
现在，我得到了两个平方项减去一。
In this, three minus two equals more than one.
在这里，三减二往往是大于一的。
YA What I derived was xA of two minus yA of one.
我得到的是2的xA减去1的。
One plus two is three. Six minus four is two.
一加二等于三。六减四等于二。
Then F is one minus one plus two, is equal to two.
那么F等于1减去1再加上2。
Then F is one minus one plus two, is equal to two.
那么F等于1减去1再加上2。
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