Answer
$c^5+5c^4d+10c^3d^2+10c^2d^3+5cd^4+d^5
$
Work Step by Step
The coefficients in the the $n=
5
$ row of Pascal's Triangle are $\{
1,5,10,10,5,1
\}$. Using these as the coefficients of the terms that follow the pattern in expanding binomials, the expression $
(c+d)^5
$ expands to
\begin{array}{l}
c^5+5c^4d+10c^3d^2+10c^2d^3+5cd^4+d^5
.\end{array}