$\snippet{name: op_column, sign: '-', x: '83', y: '62', z: '21'}$
Проверка:
1) $\snippet{name: op_column, sign: '+', x: '21', y: '62', z: '83'}$;
2) $\snippet{name: op_column, sign: '-', x: '83', y: '21', z: '62'}$.
 
$\snippet{name: op_column, sign: '+', x: '24', y: '53', z: '77'}$
Проверка:
1) $\snippet{name: op_column, sign: '-', x: '77', y: '53', z: '24'}$;
2) $\snippet{name: op_column, sign: '-', x: '77', y: '24', z: '53'}$.
 
$\snippet{name: op_column, sign: '-', x: '76', y: '53', z: '23'}$
Проверка:
1) $\snippet{name: op_column, sign: '+', x: '23', y: '53', z: '76'}$;
2) $\snippet{name: op_column, sign: '-', x: '76', y: '23', z: '53'}$.
 
$\snippet{name: op_column, sign: '+', x: '53', y: '34', z: '87'}$
Проверка:
1) $\snippet{name: op_column, sign: '-', x: '87', y: '34', z: '53'}$;
2) $\snippet{name: op_column, sign: '-', x: '87', y: '53', z: '34'}$.
 
$\snippet{name: op_column, sign: '-', x: '89', y: '66', z: '23'}$
Проверка:
1) $\snippet{name: op_column, sign: '+', x: '23', y: '66', z: '89'}$;
2) $\snippet{name: op_column, sign: '-', x: '89', y: '23', z: '66'}$.