$\snippet{name: op_column, sign: '+', x: '36', y: '29', z: ' '}$
$\snippet{name: op_column, sign: '-', x: '53', y: '38', z: ' '}$
$\snippet{name: op_column, sign: '-', x: '72', y: '46', z: ' '}$
$\snippet{name: op_column, sign: '+', x: '43', y: '48', z: ' '}$
$\snippet{name: op_column, sign: '-', x: '83', y: '35', z: ' '}$
$\snippet{name: op_column, sign: '+', x: '36', y: '29', z: '65 '}$
$\snippet{name: op_column, sign: '-', x: '53', y: '38', z: '15 '}$
$\snippet{name: op_column, sign: '-', x: '72', y: '46', z: '26 '}$
$\snippet{name: op_column, sign: '+', x: '43', y: '48', z: '91 '}$
$\snippet{name: op_column, sign: '-', x: '83', y: '35', z: '48 '}$