1) = 3^(7+2+5) = 3^14
2)=2^1*2^3*2^4*2^5 = 2^(1+3+4+5) = 2^ 13
3) = 3^(5-3)=3^2
4) = 7^(12-5-3)= 7^4
5) =7^(12+5) : 7^3 = 7^17 : 7^3 = 7^(17-3) = 7^14
6= 7^12 : (7^(5+3))= 7^12 : 7^8= 7^(12-8) = 7^ 4
7) =7^12 : 7^(5-3)= 7^12 : 7^2= 7^(12-2) =7^10
^- СТЕПЕНЬ