Решение:
а) 43212 : 78 − 407 * 720 + 350 * 509 = −114336;
$$ \begin{align*} \snippet{name: long_division, x: 43212, y: 78} & \snippet{name: column_multiplication, x: 407, y: 720} & \snippet{name: column_multiplication, x: 350, y: 509} & \snippet{name: op_column, sign: '+', x: 178150, y: 554, z: 178704} & \snippet{name: op_column, sign: '-', x: 293040, y: 178704, z: 114336} \end{align*} $$;
б) 164 * 756 + 148916 − 564 * 702 + 48762 : 86 = −122461;
$$ \begin{align*} \snippet{name: column_multiplication, x: 164, y: 756} & \snippet{name: column_multiplication, x: 564, y: 702} & \snippet{name: long_division, x: 48762, y: 86} & \snippet{name: op_column, sign: '+', x: 123984, y: 148916, z: 272900} & \snippet{name: op_column, sign: '+', x: 272900, y: 567, z: 273467} & \snippet{name: op_column, sign: '-', x: 395928, y: 273467, z: 122461} \end{align*} $$;
в) (24968 + 11648) : (768 − 1564) = −46;
$$ \begin{align*} \snippet{name: op_column, sign: '+', x: 24968, y: 11648, z: 36616} & \snippet{name: op_column, sign: '-', x: 1564, y: 768, z: 796} & \snippet{name: long_division, x: 36616, y: 796} \end{align*} $$;
г) 37115 : 65 − 72 675 : 85 = −284
$$ \begin{align*} \snippet{name: long_division, x: 37115, y: 65} & \snippet{name: long_division, x: 72675, y: 85} & \snippet{name: op_column, sign: '-', x: 855, y: 571, z: 284} \end{align*} $$.
Ответ:
а) −114336;
б) −122461;
в) −46;
г) −284.