There are also a few good things to take note of when looking at an expansion:
There are \(n+1\) terms in the expansion \(\left(x+y\right)^n.\)
The degree of each term is \(n.\)
The powers on \(x\) begin with \(n\) and decrease to \(0.\)
The powers on \(y\) begin with \(0\) and increase to \(n.\)
The coefficients are symmetric.