$\snippet{name: op_column, sign: '-', x: 73, y: 46, z: ''}$
$\snippet{name: op_column, sign: '+', x: 81, y: 19, z: ''}$
$\snippet{name: op_column, sign: '-', x: 92, y: 18, z: ''}$
$\snippet{name: op_column, sign: '+', x: 64, y: 26, z: ''}$
$\snippet{name: op_column, sign: '-', x: 45, y: 27, z: ''}$
$\snippet{name: op_column, sign: '+', x: 75, y: 15, z: ''}$

$\snippet{name: op_column, sign: '-', x: 73, y: 46, z: '27'}$
$\snippet{name: op_column, sign: '+', x: 81, y: 19, z: '100'}$
$\snippet{name: op_column, sign: '-', x: 92, y: 18, z: '74'}$
$\snippet{name: op_column, sign: '+', x: 64, y: 26, z: '90'}$
$\snippet{name: op_column, sign: '-', x: 45, y: 27, z: '18'}$
$\snippet{name: op_column, sign: '+', x: 75, y: 15, z: '90'}$