$2^8\div2^5+\sqrt{121}=$  

(a)  

 $\sqrt{5\times2+6}+2^5\div2^3=$  

(a)  

 $7^5\div7^3-3^2\times5=$  

(a)  

 $2^4\div\sqrt{20\times3+4}=$  

(a)  

 $2\times\sqrt{144}-\sqrt{16}=$  

(a)  

(a)  

(a)  

(a)  

(a)  

(a)