745 + 476 = 1221
 
$\snippet{name: op_column, sign: '+', x: '745', y: '476', z: '1221 '}$

472 − 398 = 74
 
$\snippet{name: op_column, sign: '-', x: '472', y: '398', z: '74 '}$

2842 : 7 = 406
 
$\snippet{name: long_division, x: 2842, y: 7}$

342 * 25 = 8550
 
$\snippet{name: column_multiplication, x: 342, y: 25}$

47 * 24 − 39 = 1128 − 39 = 1089
 
$\snippet{name: column_multiplication, x: 47, y: 24}$
 
$\snippet{name: op_column, sign: '-', x: '1128', y: '39', z: '1089 '}$

840 : 12 + 15 = 70 + 15 = 85
 
$\snippet{name: long_division, x: 840, y: 12}$
 
$\snippet{name: op_column, sign: '+', x: '70', y: '15', z: '85 '}$

24 * (327 − 276) = 24 * 51 = 1224
 
$\snippet{name: op_column, sign: '-', x: '327', y: '276', z: '51 '}$
 
$\snippet{name: column_multiplication, x: 24, y: 51}$

(247 + 578) : 25 = 825 : 25 = 33
 
$\snippet{name: op_column, sign: '+', x: '247', y: '578', z: '825 '}$
 
$\snippet{name: long_division, x: 825, y: 25}$