Thực hiện phép tính (tính hợp lí nếu có thể):

a) \({2^3}{.2^2} - \left( {{{2024}^0} + 19} \right):{2^2}\)

\( = {2^5} - \left( {1 + 19} \right):4\)

\( = 32 - 20:4\)

\( = 32 - 5\)

\( = 27\).

c) \(8.\left( { - 84} \right).\left( { - 125} \right)\)

\( = 8.\left( { - 125} \right).\left( { - 84} \right)\)

\( = \left( { - 1000} \right).\left( { - 84} \right)\)

\( = 84\,000\).

b) \( - 46 + 391 - \left( { - 246} \right) - 691\)

\[ = \left( { - 46 + 246} \right) + \left( {391 - 691} \right)\]

\[ = 200 + \left( { - 300} \right)\]

\( =  - 100\).

d) \(59.\left( {8 - 73} \right) - 73.\left( {8 - 59} \right)\)

\( = 59.8 - 59.73 - 73.8 + 73.59\)

\( = 59.8 - 73.8\)

\( = 8.\left( {59 - 73} \right)\)

\( = 8.\left( { - 14} \right)\)

\( =  - 112\).