1. 5^27÷5^26 +5 ×[5^4÷5^4÷(125-120)] = 5+5×1/5 = 5+1 =6
2. 2^5+ 2^40 - 2×[2^7÷2^5 + 2³÷(32-24) ] = 2^5+2^40 -2· [4+1]=2^5+2^40 - 10 = 22+2^40 = 2(11+2^39)........ ai scris ceva gresit!!!!!
3. Uc(N) =Uc(1^33) +Uc(4^34) + Uc(7^35) = 1+6 +Uc[7^(32+3)] =7+3 =0
OBSERVATII: Uc(4^impara) =4 Uc(4^para )=4