Vă rog,am nevoie acuuuuummmmm!!!!!!!

12)
a. 8^3
b.13^1+13=13+13=26
c.7^3-7^2=343-49=294
d.7^4-7^3+1=7×(4+3)+1=7×7+1=50
e.15^22:15^20-15^0=15^2-1=224
f.3^2×9^18:27^6=3^2×(3^2)^18 (aici este 2 la a 2 totul la 18):27^6=3^2×3^36:(3^3)^6=3^2×3^36:3^18=3^38:3^18=3^20

13)
a) (2^4)^7 - 2^28 = 2^28 - 2^28 = 0
b) (3^5)^4 : 3^19 = 3^20 : 3^19 = 3
d) (5^8)^7 : (5^53 ×5) =
= 5^56 : 5^54 =
= 5^2 = 25
e) (7^7)^7 : (7^77:7^7×5) =
= 7^49 : (7^77:7^35) =
= 7^49 : 7^42 =
= 7^7
f) (13^8)^13 : (13^26)^4 =
= 13^104 : 13^104 =
= 1
g) 7^169 : 7^168 = 7
h) 2^49 : 2^48 = 2
i) 3^64 : 3^64 = 1

14)
b) 3^20 × 2^20 -6^23 : 6^3 =
= (3×2)^20 - 6^20 =
= 6^20 -6^20 =
= 0
c) 2^18 × 12^18 : (6^16 × 4^16) =
= (2×12)^18 : (6×4)^16 =
= 24^18 : 24 ^16 =
= 24^2 =
= 576

d) 75^38 : 25^38 -(3^19)^2 =
= (75:25)^38 - 3^38 =
= 3^38 - 3^38 =
= 0
e)26^27 : 13^27 : 2^25 =
= (26:13)^27 : 2^25 =
= 2^27 : 2^25 =
= 2^2 =
= 4
f) 10^64 : 2^64 - 5^64 =
= (10:2)^64 - 5^64 =
= 5^64 -5^64 =
= 0