$(421 \overset{1}{-} 287) \overset{2}{*} 8 = 1072$
1) 421 − 287 = 134
2) 134 * 8 = 1072

Вычисления:
1)
$\snippet{name: op_column, sign: '-', x: '421', y: '287', z: '134 '}$
2)
$\snippet{name: column_multiplication, x: 134, y: 8}$

$27 \overset{1}{*} 75 \overset{3}{-} 34 \overset{2}{*} 43 = 563$
1) 27 * 75 = 2025
2) 34 * 43 = 1462
3) 2025 − 1462 = 563

Вычисления:
1)
$\snippet{name: column_multiplication, x: 27, y: 75}$
2)
$\snippet{name: column_multiplication, x: 34, y: 43}$
3)
$\snippet{name: op_column, sign: '-', x: '2025', y: '1462', z: '563 '}$

$118 \overset{1}{*} 24 \overset{3}{+} 128 \overset{2}{*} 25 = 6032$
1) 118 * 24 = 2832
2) 128 * 25 = 3200
3) 2832 + 3200 = 6032

Вычисления:
1)
$\snippet{name: column_multiplication, x: 118, y: 24}$
2)
$\snippet{name: column_multiplication, x: 128, y: 25}$
3)
$\snippet{name: op_column, sign: '+', x: '2832', y: '3200', z: '6032 '}$

$43 \overset{1}{*} 32 \overset{2}{*} 35 = 48160$
1) 43 * 32 = 1376
2) 1376 * 35 = 48160

Вычисления:
1)
$\snippet{name: column_multiplication, x: 43, y: 32}$
2)
$\snippet{name: column_multiplication, x: 1376, y: 35}$

$(427 \overset{1}{-} 389) \overset{3}{*} (56 \overset{2}{+} 105) = 6118$
1) 427 − 389 = 38
2) 105 + 56 = 161
3) 38 * 161 = 6118

Вычисления:
1)
$\snippet{name: op_column, sign: '-', x: '427', y: '389', z: '38 '}$
2)
$\snippet{name: op_column, sign: '+', x: '105', y: '56', z: '161 '}$
3)
$\snippet{name: column_multiplication, x: 161, y: 38}$

$(2103 \overset{1}{+} 1937 \overset{2}{-} 3041) \overset{3}{*} 21 = 20979$
1) 2103 + 1937 = 4040
2) 4040 − 3041 = 999
3) 999 * 21 = 20979

Вычисления:
1)
$\snippet{name: op_column, sign: '-', x: '2103', y: '1937', z: '4040 '}$
2)
$\snippet{name: op_column, sign: '-', x: '4040', y: '3041', z: '999 '}$
3)
$\snippet{name: column_multiplication, x: 999, y: 21}$