3^1=3
3^2=9
3^3=27
3^4=81
apoi se repeta
2^1=2
2^2=4
2^3=8
2^4=16
apoi se repeta
U(3^306+2^704)=U[3^(4*76+2)+2^(4*175+4)]=U(3^2+2^4)=U(9+16)=
=U(25)=5
4^1=4
4^2=16
apoi se repeta
5 la orice putere se termina in 5
U(4^129+5^130)=U[4^(2*64+1)+5)]=U(4^1+5)=U(9)=9
7^1=7
7^2=49
7^3=343
7^4=2401
apoi se repeta
6 la orice putere setermina in 6
Uc(7^438+6^168)=Uc[7^4*109+2+6)]=U(49+6)=U(55)=5