$\snippet{name: op_column, sign: '-', x: '54', y: '26', z: ' '}$
$\snippet{name: op_column, sign: '+', x: '43', y: '18', z: ' '}$
$\snippet{name: op_column, sign: '-', x: '70', y: '31', z: ' '}$
$\snippet{name: op_column, sign: '+', x: '35', y: '49', z: ' '}$
$\snippet{name: op_column, sign: '-', x: '82', y: '25', z: ' '}$
$\snippet{name: op_column, sign: '-', x: '54', y: '26', z: '28 '}$
$\snippet{name: op_column, sign: '+', x: '43', y: '18', z: '61 '}$
$\snippet{name: op_column, sign: '-', x: '70', y: '31', z: '39 '}$
$\snippet{name: op_column, sign: '+', x: '35', y: '49', z: '84 '}$
$\snippet{name: op_column, sign: '-', x: '82', y: '25', z: '57 '}$