4)(10^-10 * 100^6)^-4 = (10^-10 * (10^2)^6)^-4 = (10^2)^-4 = 10^-8 = 0,00000001
5)6^-4 * 6^-9 / 6^-12 = 6^-4+(-9)+12 = 6^-1 = 1/6 = 0,1666666667
6)7^-2 * 7^-8 / 7^-11 = 7^-2+(-8)+11 = 7^1 = 7
7)6^-4 / 3^-4 * 2^-6 = 3^-4 * 2^-4 / 3^-4 * 2^-6 = 2^2 = 4
8)3^-2 * 5^-3 / 15^-3 = 3^-2 * 5^-3 / 3^-3 * 5^-3 = 3^1 = 3
9)3^-10 * 9^8 / (-3)^2 = 3^-10 * (3^2)^8 / 3^-2 = 3^-10+16+2 = 3^8 = 6561
10)5^-5 * 25^10 / 125^3 = 5^-5 * 25^10 / 5^3 * 25^3 = 5^-8 * 25^7 = 5^-8 * (5^2)^7 = 5^-8 * 5^14 = 5^6 = 15625
11)(2^3)^5 * (2^-6)^2 / 4^2 = (2^3)^5 * (2^-6)^2 / (2^2)^2 = 2^8 * 2^-12 / 2^4 = 2^8+(-12)-4 = 2^-8 = 0,00390625
12)11^0 : (11^-1)^2 = 11^0 : 11^-2 = 11^2 = 121