$\snippet{name: op_column, sign: '+', x: 65, y: 24, z: 89}$
$\snippet{name: op_column, sign: '-', x: 78, y: 43, z: 35}$
$\snippet{name: op_column, sign: '+', x: 36, y: 12, z: 48}$
$\snippet{name: op_column, sign: '-', x: 52, y: 24, z: 28}$
$\snippet{name: op_column, sign: '-', x: 90, y: 17, z: 73}$
