Вычисли

а) \(\cfrac{5^{12}+5^{10}}{5^{10}+5^{11}}=\) [ ];

б) \(\cfrac{7^9+7^{10}}{7^{11}+7^9}=\) [ ];

в) \(\cfrac{2^5+2^7}{2^4+2^6}=\) [ ].