Normally I would create a tree and then simplify a long expression for these types of problems but this one says to do it without expanding.

So I'm assuming I would I do something like this?

\(\displaystyle _{17}C_5(2x)^{12}(-3y)^5\)

\(\displaystyle 17! / 12! 5!\)

\(\displaystyle 4096x^{12}(-243)y^5\)

\(\displaystyle 17 * 16 * 15* 14* 13\) / \(\displaystyle 5 * 4* 3* 2\)

\(\displaystyle 6188 * 4096 * -243 = -6,159,089,664x^{12}y^5\)

Is this still considered expanding?