9C5⋅35{ }^{9} C_{5} \cdot 3^{5}9C5⋅35
−9C535-{ }^{9} C_{5} 3^{5}−9C535
9C4⋅34{ }^{9} \mathrm{C}_{4} \cdot 3^{4}9C4⋅34
−9C434-{ }^{9} \mathrm{C}_{4} 3^{4}−9C434