$$\frac{8!}{5!3!2!}$$

(a)  

$$\frac{11!}{9!2!}$$

(a)  

(6-1)!

(a)  

$$\frac{8!}{5!\left(8-5\right)!}$$

(a)  

5! . 2!

(a)  

3! + 5!

(a)  

$$\frac{9!}{\left(9-2\right)!}$$

(a)  

$$\frac{20!}{19!}$$

(a)  

$$\frac{10!3!}{8!}$$

(a)