$2307 \overset{1}{-} 453 \overset{2}{+} 636 = 2490$
1)
$\snippet{name: op_column, sign: '-', x: 2307, y: 453, z: 1854}$
2)
$\snippet{name: op_column, sign: '+', x: 1854, y: 636, z: 2490}$

$734 \overset{1}{+} 2586 \overset{2}{-} 1090 \overset{3}{+} 175 = 2405$
1)
$\snippet{name: op_column, sign: '+', x: 2586, y: 734, z: 3320}$
2)
$\snippet{name: op_column, sign: '-', x: 3320, y: 1090, z: 2230}$
3)
$\snippet{name: op_column, sign: '+', x: 2230, y: 175, z: 2405}$

$7488 \overset{1}{:} 144 \overset{2}{:} 4 \overset{3}{*} 20 = 260$
1)
$\snippet{name: long_division, x: 7488, y: 144}$
2)
$\snippet{name: long_division, x: 52, y: 4}$
3)
$\snippet{name: column_multiplication, x: 13, y: 20}$

$6400 \overset{1}{:} 16 \overset{2}{*} 50 \overset{3}{:} 125 = 160$
1)
$\snippet{name: long_division, x: 6400, y: 16}$
2)
$\snippet{name: column_multiplication, x: 400, y: 50}$
3)
$\snippet{name: long_division, x: 20000, y: 125}$