$\snippet{name: op_column, sign: '-', x: '72', y: '18', z: '54'}$
Проверка:
1) $\snippet{name: op_column, sign: '-', x: '72', y: '54', z: '18'}$;
2) $\snippet{name: op_column, sign: '+', x: '18', y: '54', z: '72'}$.
 
$\snippet{name: op_column, sign: '-', x: '78', y: '12', z: '66'}$
Проверка:
1) $\snippet{name: op_column, sign: '-', x: '78', y: '66', z: '12'}$;
2) $\snippet{name: op_column, sign: '+', x: '66', y: '12', z: '78'}$.
 
$\snippet{name: op_column, sign: '+', x: '35', y: '44', z: '79'}$
Проверка:
1) $\snippet{name: op_column, sign: '-', x: '79', y: '35', z: '44'}$;
2) $\snippet{name: op_column, sign: '-', x: '79', y: '44', z: '35'}$.
 
$\snippet{name: op_column, sign: '+', x: '57', y: '28', z: '85'}$
Проверка:
1) $\snippet{name: op_column, sign: '-', x: '85', y: '57', z: '28'}$;
2) $\snippet{name: op_column, sign: '-', x: '85', y: '28', z: '57'}$.