このへんに色々載ってます

http://mathworld.wolfram.com/1.html

http://mathworld.wolfram.com/2.html

http://mathworld.wolfram.com/3.html

http://mathworld.wolfram.com/4.html

http://mathworld.wolfram.com/5.html

http://mathworld.wolfram.com/6.html

http://mathworld.wolfram.com/7.html

http://mathworld.wolfram.com/8.html

http://mathworld.wolfram.com/9.html

http://mathworld.wolfram.com/10.html

http://mathworld.wolfram.com/11.html

http://mathworld.wolfram.com/12.html

1＝ｰe^(iπ)

1＝lim(sinΘ/Θ)

Θ→0

1＝(e^x)'/e^x

1＝0！

2＝(sin2α)／(sinα･cosα)

3＝{(b-c)^3 + (c-a)^3 + (a-b)^3}/{(b-c)(c-a)(a-b)}

4＝(cos3α＋3cosα)／(cosα)^3

5＝(2＋i)(2ｰi)

6＝n(n+1)(2n+1)/(1^2 + 2^2 + ... + (n-1)^2 + n^2)