真實故事-生命最後的十分鐘，珍惜現在！ 


這個事件是真實故事，1985年日本航空123班機的空難事件，520人死亡，僅4人生還，目前仍是航空史上第三大空難。這架滿載的班機，在起飛後，忽然爆炸，爆炸後掙扎了半小時才墜落.... 

後來，在那地獄般的失事現場，搜尋出很多的紙條，都是在死亡前大家留給家人們的字條。


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A curious connection : What's the function $f(x)$?

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Issue with $int_0^inftyfraccos(x^2)x^2dx$

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Equality of field extensions given Splitting field is $S_n$.

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