9C3×23{ }^{9} \mathrm{C}_{3} \times 2^{3}9C3×23
−9C3×23-{ }^{9} C_{3} \times 2^{3}−9C3×23
9C3×26{ }^{9} C_{3} \times 2^{6}9C3×26
−9C3×26-{ }^{9} \mathrm{C}_{3} \times 2^{6}−9C3×26