Answer: \(1144\).

Answer: \(1144\).

The three brothers must not be separated, so there are two cases.

Case 1: all three brothers are chosen.

Then the remaining \(3\) team members must be chosen from the other \(12\) people:

\({}^{12}C_3=220.\)

Case 2: none of the brothers is chosen.

Then all \(6\) team members must be chosen from the other \(12\) people:

\({}^{12}C_6=924.\)

Therefore the total number of possible teams is

\(220+924=1144.\)