Using Pascal’s triangle (or the binomial equation), you can quickly expand an equation such as $(x+h)^x$.

To do this you:

1. Look at the $n$-th row of the triangle (counting the very top 1 as row 0).
2. First term ($x$): Its power starts at $n$ and counts down to 0.
3. Its power starts at 0 and counts up to $n$.

Example

$(x+h)^3$ becomes $1x^3 + 3x^2h^1 + 3x^1h^2 + 1h^3$, cleanly written as $x^3 + 3x^2h + 3xh^2 + h^3$.