$5^2+6\left(3\right)=$  

(a)  

 $\sqrt{81\ }$  (3) - 4 (3)=

(a)  

 $2^3$  -  $3^{2^{ }}$  =

(a)  

 $\sqrt{36}$  + $\sqrt{16}$  =

(a)  

 $56\div8$  - 2 (5) =

(a)  

-23 - 14 +7=

(a)  

6 (-9) + 5 (-4)

(a)  

 $\sqrt{144}$  -  $\sqrt{49}$   =

(a)  

7 (3) - 100  $\div$  4 =

(a)