Răspuns:
[tex]( {5}^{2} - {4}^{2} ) \div 9 \\ (25 - 16) \div 9 \\ 9 \div 9 \\ = 1 \\ \\ 12 \times 35 - 12 \times 24 + 12 \\ 12 \times (35 - 24 + 1) \\ 12 \times 12 \\ = 144 \\ (( {9}^{2} - {2}^{4} \times {5}^{9} \div ( {5}^{4} )^{2} ) \div {2}^{2} \\ ({3}^{4} - {2}^{4} \times {5}^{9} \div {5}^{8} ) \div {2}^{2} \\ ( {3}^{4} - {2}^{4} \times 5) \div {2}^{2} \\ (81 - 80) \div {2}^{2} \\ 1 \div {2}^{2} \\ = {2}^{2} [/tex]
