Đáp án:
$\begin{array}{l}
c){2^3}.3 - \left( {{1^{10}} + 8} \right):{3^2}\\
= 8.3 - \left( {1 + 8} \right):9\\
= 24 - 9:9\\
= 24 - 1\\
= 23\\
\left( {{5^9} + {7^4} - {2^5}} \right).\left( {17 - 51:3} \right)\\
= \left( {{5^9} + {7^4} - {2^5}} \right).\left( {17 - 17} \right)\\
= \left( {{5^9} + {7^4} - {2^5}} \right).0\\
= 0\\
d)2.\left\{ {198 - \left[ {158 - \left( {46 + 4} \right).2} \right]} \right\}\\
= 2.\left\{ {198 - \left[ {158 - 50.2} \right]} \right\}\\
= 2.\left( {198 - 58} \right)\\
= 2.140\\
= 280\\
29 - \left[ {16 + 3.\left( {51 - 49} \right)} \right]\\
= 29 - \left( {16 + 3.2} \right)\\
= 29 - \left( {16 - 6} \right)\\
= 29 - 10\\
= 19
\end{array}$
