(6568 − (8007 − 6999)) * 1001 = (6568 − 1008) * 1001 = 5560 * 1001 = 5565560
1)
$\snippet{name: op_column, sign: '-', x: 8007, y: 6999, z: 1008}$
2)
$\snippet{name: op_column, sign: '-', x: 6568, y: 1008, z: 5560}$
3)
$\snippet{name: column_multiplication, x: 5560, y: 1001}$

(801 * 601 + (10000 − 9876) * 99) * 40 = (481401 + 124 * 99) * 40 = (418401 + 12276) * 40 = 493677 * 40 = 19747080
1)
$\snippet{name: op_column, sign: '-', x: 10000, y: 9876, z: 124}$
2)
$\snippet{name: column_multiplication, x: 801, y: 601}$
3)
$\snippet{name: column_multiplication, x: 124, y: 99}$
4)
$\snippet{name: op_column, sign: '+', x: 481401, y: 12276, z: 493677}$
5)
$\snippet{name: column_multiplication, x: 493677, y: 40}$

157464 : (14904 : 23) = 157464 : 648 = 243
1)
$\snippet{name: long_division, x: 14904, y: 23}$
2)
$\snippet{name: long_division, x: 157464, y: 648}$

(97548 + 69432) : (16400 − 15388) = 166980 : 1012 = 165
1)
$\snippet{name: op_column, sign: '+', x: 97548, y: 69432, z: 166980}$
2)
$\snippet{name: op_column, sign: '-', x: 16400, y: 15388, z: 1012}$
3)
$\snippet{name: long_division, x: 166980, y: 1012}$