a) [7·(14-14):2]² = (7·0:2)² = 0
b) (100-64):6:2+1 = 36:6:2+1 = 6:2+1 = 3+1 =4
c) (17·(25-24)·1-15)·8-4·3 = (17·1-15)·8-12 = 2·8-12 = 16-12 = 4
d) [(81-16·5)+[tex]5^{9} : 5^{8} [/tex]]·4 = (81-80+5)·4 = (1+5)·4 = 6·4 = 24
e) {[(13²:13-8):5+(7·8-6):5+8]:19+5}·8-16·3= {[(13-8):5+(56-6):5+8]:19+5}·8-48 = [(5:5+50:5+8):19+5]·8-48 = [(1:10:8):19+5]·8-48 = (19:19+5)·8-48 = (1+5)·8-48 = 6·8-48= 48-48 = 0
f) [tex](3^{30} + 2^{27} -1):[(3^{3})^{10}+(2^{3})^{9} -1][/tex] = [tex](3^{30} + 2^{27} -1):(3^{30} + 2^{27} -1)[/tex] = 1
