$(4475 \overset{1}{-} 3991) \overset{2}{*} 50 \overset{4}{+} 2189 \overset{3}{*} 30 = 89870$
1)
$\snippet{name: op_column, sign: '-', x: '4475', y: '3991', z: '484 '}$
2)
$\snippet{name: op_column, sign: 'x', x: '484  ', y: '50', z: '24200 '}$
3)
$\snippet{name: op_column, sign: 'x', x: '2189  ', y: '30', z: '65670 '}$
4)
$\snippet{name: op_column, sign: '+', x: '24200', y: '65670', z: '89870 '}$