$\snippet{name: op_column, sign: '-', x: '87', y: '16', z: '71'}$
Проверка:
1) $\snippet{name: op_column, sign: '+', x: '16', y: '71', z: '87'}$;
2) $\snippet{name: op_column, sign: '-', x: '87', y: '71', z: '16'}$.
 
$\snippet{name: op_column, sign: '-', x: '49', y: '24', z: '25'}$
Проверка:
1) $\snippet{name: op_column, sign: '+', x: '25', y: '24', z: '49'}$;
2) $\snippet{name: op_column, sign: '-', x: '49', y: '25', z: '24'}$.
 
$\snippet{name: op_column, sign: '+', x: '58', y: '12', z: '70'}$
Проверка:
1) $\snippet{name: op_column, sign: '-', x: '70', y: '12', z: '58'}$;
2) $\snippet{name: op_column, sign: '-', x: '70', y: '58', z: '12'}$.
 
$\snippet{name: op_column, sign: '+', x: '42', y: '38', z: '80'}$
Проверка:
1) $\snippet{name: op_column, sign: '-', x: '80', y: '38', z: '42'}$;
2) $\snippet{name: op_column, sign: '-', x: '80', y: '42', z: '38'}$.