[tex]\displaystyle\bf\\1)\\\\a^{7} \cdot a^{10} :a^{14} =a^{7+10-14} =a^{3}\\\\a=5\\\\a^{3} =5^{3} =125\\\\Otvet: \ 125\\\\\\2)\\\\a^{25}\cdot a^{-4} :a^{16} =a^{25+(-4)-16} =a^{25-4-16} =a^{5} \\\\a=2\\\\a^{5} =2^{5} =32\\\\Otvet: \ 32[/tex]