Đáp án:
$\begin{array}{l}
a)\left( {{2^{193}} + {2^{192}} - {2^{191}}} \right):{2^{191}} + 2021\\
= \left( {{2^2} + 2 - 1} \right){.2^{191}}:{2^{191}} + 2021\\
= \left( {4 + 2 - 1} \right) + 2021\\
= 2026\\
b)\left( {{4^{19}} + {3^{21}}} \right)\left( {{5^{20}} - {3^{15}}} \right).\left( {{2^6} - {8^2}} \right)\\
= \left( {{4^{19}} + {3^{21}}} \right)\left( {{5^{20}} - {3^{15}}} \right).\left( {{2^6} - {2^{3.2}}} \right)\\
= \left( {{4^{19}} + {3^{21}}} \right)\left( {{5^{20}} - {3^{15}}} \right).\left( {{2^6} - {2^6}} \right)\\
= \left( {{4^{19}} + {3^{21}}} \right)\left( {{5^{20}} - {3^{15}}} \right).0\\
= 0\\
c){2^5}.197 + {197.3^2} + {197.59^1}\\
= 197.\left( {{2^5} + {3^2} + {{59}^1}} \right)\\
= 197.\left( {32 + 9 + 59} \right)\\
= 197.100\\
= 19700
\end{array}$
