80-(4.5 mũ 2-3.2 mũ 3) 1997-[10.(4 mũ 3-56):2 mũ 3 +2 mũ3].2005 35-{12-[-14+(-2)]} 49-(-54)-23 13-18-(-42)-15 -452-(-67+75-452) 5+(-7)+9+(-11)+13+(-15

\(\begin{array}{l}80 – \left( {{{4.5}^2} – {{3.2}^3}} \right)\\ = 80 – \left( {4.25 – 3.8} \right)\\ = 80 – \left( {100 – 24} \right)\\ = 80 – 100 + 24\\ = \,\,\, – 20 + 24\\ = \,\,\,\,\,\,\,\,\,\,4\end{array}\)

\(\begin{array}{l}1997 – \left[ {10.\left( {{4^3} – 56} \right):{2^3} + {2^3}} \right].2005\\ = 1997 – \left[ {10.\left( {64 – 56} \right):8 + 8} \right].2005\\ = 1997 – \left[ {10.8:8 + 8} \right].2005\\ = 1997 – \,\,\,\,\,\,18.2005\\ = 1997 – 36090\\ =  – 34093\end{array}\)

\(\begin{array}{l}35 – \left\{ {12 – \left[ { – 14 + \left( { – 2} \right)} \right]} \right\}\\ = 35 – \left( {12 + 16} \right)\\ = 35 – \,\,\,\,28\\ = 7\end{array}\)

\(\begin{array}{l}49 – \left( { – 54} \right) – 23\\ = 49 + 54 – 23\\ = 49 + 31\\ = 80\end{array}\)