325 + 723 = 1048
$\snippet{name: op_column, sign: '+', x: '325', y: '723', z: '1048'}$

729 + 628 = 1357
$\snippet{name: op_column, sign: '+', x: '729', y: '628', z: '1357'}$

615 + 876 = 1491
$\snippet{name: op_column, sign: '+', x: '615', y: '876', z: '1491'}$

359 + 987 = 1346
$\snippet{name: op_column, sign: '+', x: '359', y: '987', z: '1346'}$

354 − 221 = 133
$\snippet{name: op_column, sign: '-', x: '354', y: '221', z: '133'}$

284 − 139 = 145
$\snippet{name: op_column, sign: '-', x: '284', y: '139', z: '145'}$

923 − 281 = 642
$\snippet{name: op_column, sign: '-', x: '923', y: '281', z: '642'}$

725 − 189 = 536
$\snippet{name: op_column, sign: '-', x: '725', y: '189', z: '536'}$