User:JVz/TeX FAQ

Here's a list of some weird LaTeX things that I'd like to note.

How do I make a combination?
$$ { n \choose r } = \frac{n!}{k!(n - k)!} $$

How do I make an integral?
$$ \int_{x_0}^{x_1} f(t) dt $$

How do I make sums/products?
$$ \sum_{i=0}^{\infty} \frac{x^n}{n!} = e^x $$