a) 5^140 : 5^140 + 2^96 : 2^96 + 10^50 : 10^48 - (2x5)^2 =2
=1 + 1 + 10^2 - 10^2
=2
Edit: In primul rand:
Orice numar a impartit la el insusi va da 1.
Exemplu: 7^4580 : 7^4580 = 1
In al doilea rand:
1) Daca 25^2=625 atunci 25^2=5^4=625 adica 25^2=(5^2)^2=5^4
8^32=(2^3)^32=2^3x32
25^70=(5^2)^70=5^2x70
