7. Calculaţi: a) 4":(2-27¹)+(3+3-105): 106; b) 3 + 30:38-3+3 37:35+2-310: (5.35 +35)+9.3%; 3² 33 +254 : 202 + (35)*: 3291: 31; d) [34: 31⁰ + (2^3 + 6²³.6¹³: [(3³) (2²) +3¹" 3" + (2³)*]; 10 (242:576+3 [(32-2)¹5 (329⁹-2¹5) +12¹]}:13; 32100:1250-24+ (210.215)5:227 +(576: 575-3). 2% +2%); 2137-310 +2203:2108-5-(52)³1: (317 +225-511),
