Упрости выражения

a) \(3^2\cdot 3^4=3\cdot 3\cdot 3\cdot 3\cdot 3\cdot 3=3^6\) ;

\(6^4\cdot 6^3=\) [ ];

\(7^2\cdot 7^3=\) [ ];

\(9\cdot 9^2\cdot 9^3=\) [ ].

б) \(3^5:3^2=\dfrac{3^5}{3^2}=\dfrac{^1\cancel{3}\cdot ^1\cancel{3}\cdot 3\cdot 3\cdot 3}{\cancel{3}\_1\cdot \cancel{3}\_1}=3^3\) ;

\(5^7:5^3=\) [ ];

\(9^6:9^5=\) [ ];

\(14^4:14=\) [ ].