User:Mitchman/Sandbox

$e ^{i \pi} + 1 = 0$

Try the whole thing between dollar signs. And use braces to enclose expressions in exponents. And a backslash before the pi. Marty 09:22, 28 September 2008 (PDT) $e^{i \pi} + 1 = 0$.

This is Problem 4 of Homework 2
The first statement is:
 * $ \frac{2}{3} - \frac{1}{9} = \frac{5}{9}. $

The second statement is:
 * If $x$ is an integer, then $x^{2 + 3} \leq (x^2)^3$.

The third statement is:
 * If $n \in \NN$, and $n \geq 1$, then $\sum_{i=1}^{n} i = \frac{n^{2}+n}{2}$.