Răspuns:
[tex]a) \: \: {2}^{3 } + {4}^{0} - {3}^{2} = 8 + 1 - 9 = 1 \\ b) \: \: ( {8}^{2} + {15}^{2} ) \div {17}^{2} = (64 + 225) \div 289 = 289 \div 289 = 1 \\ c) \: \: ( {2}^{2} \times {2}^{5} \times {2}^{15} ) \div {2}^{18} = {2}^{2 + 5 + 15} \div {2}^{18} = {2}^{22} \div {2}^{18} = {2}^{22 - 18 } = 4 \\ d) \: \: \: {(3}^{7}) {}^{8} \div {3}^{54} = {3}^{7 \times 8} \div {3}^{54} = {3}^{56} \div {3}^{54} = {3}^{56 - 54} = {3}^{2} [/tex]