$\left(\sqrt{6}\right)^2=?$  

(a)  

 $-\left(\sqrt{13}\right)^2=?$  

(a)  

 $\sqrt{\left(-8\right)^2}=?$  

(a)  

 $-\left(-\sqrt{5}\right)^2=?$  

(a)  

 $\sqrt{\left(-11\right)^2}=?$  

(a)  

 $\sqrt{169\times100}=?$  

(a)