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*We can type things here just like word
*This is the second item in this list
*x^2+y^2=z^2 (Pythagorean Theorem) 
*\frac{\arctan \pi}{2}=0
*\sqrt{2} is irrational, but \frac{1}{2} is not.
*\dfrac{1}{1+\dfrac{3}{\pi}}>0
* \tan\dfrac{\pi}{2}=1
*1+1=2
*Let \mu be a measure on a measurable space. A measurable space is just a set X equipped with a sigma algebra \sigma.
*\zeta(s)= \sum_{n=1}^{\infin} \frac{1}{n^s}
*\forall \varepsilon>0, \exist N\in\mathbb{N} \text{ s.t. } \left\vert f(x)-L \right\vert<\varepsilon \text{ whenever } n>N.
*Euler's formula: e^{i\pi}+1=0
*\triangle =b^2-4ac.
*\frac{d}{dx}(x^2) = 2x
*The exterior measure: |E|_e= \inf_S V(S)=\inf_S\sum_{n=1}^\infty V(I_i), where I_i are intervals in S.
*
/
Comment: It would be helpful for all answers to be preceded by the questions.