2 câu trả lời
$\begin{array}{l} 125 - \left[ {1400 - {{\left( {{4^2} - 2.3} \right)}^3}} \right]:80\\ = 125 - \left[ {1400 - {{\left( {16 - 6} \right)}^3}} \right]:80\\ = 125 - \left[ {1400 - {{10}^3}} \right]:80\\ = 125 - \left( {1400 - 1000} \right):80\\ = 125 - 400:80\\ = 125 - 5\\ = 120 \end{array}$