[tex]a) 3\cdot2=6 \\ b)2\cdot3=6 \\ c)2\cdot2=4 \\ d)- \sqrt{3} \cdot3=-3 \sqrt{3} \\ e)- \sqrt{7} \cdot-( \sqrt{7})^{3}=( \sqrt{7})^{4}=49 \\ f) 2^{3}\cdot5 \sqrt{5} :2 \sqrt{5} =2 ^{2}\cdot5=20 [/tex]
[tex]g) (3 \sqrt{7}) ^{4} : (3 \sqrt{7}) ^{2} =(3 \sqrt{7} ) ^{2} =9\cdot7=63[/tex]
[tex]h) (-5 \sqrt{2})^{3}: (-5 \sqrt{2})= (-5 \sqrt{2})^{3-1}= (-5 \sqrt{2})^{2}=5 ^{2} \cdot2=50[/tex]
