$528 \overset{2}{-} (47 \overset{1}{+} 139) = 342$
1) $\snippet{name: op_column, sign: '+', x: '139', y: '47', z: '186'}$;
2) $\snippet{name: op_column, sign: '-', x: '528', y: '186', z: '342'}$.
 
$(249 \overset{1}{+} 457) \overset{2}{-} 108 = 598$
1) $\snippet{name: op_column, sign: '+', x: '249', y: '457', z: '706'}$;
2) $\snippet{name: op_column, sign: '-', x: '706', y: '108', z: '598'}$.
 
$374 \overset{2}{-} (910 \overset{1}{-} 635) \overset{3}{+} 151 = 250$
1) $\snippet{name: op_column, sign: '-', x: '910', y: '635', z: '275'}$;
2) $\snippet{name: op_column, sign: '-', x: '374', y: '275', z: '99'}$;
3) $\snippet{name: op_column, sign: '+', x: '99', y: '151', z: '250'}$.
 
$(428 \overset{1}{+} 73) \overset{3}{-} (852 \overset{2}{-} 796) = 445$
1) $\snippet{name: op_column, sign: '+', x: '428', y: '73', z: '501'}$;
2) $\snippet{name: op_column, sign: '-', x: '852', y: '796', z: '56'}$;
3) $\snippet{name: op_column, sign: '-', x: '501', y: '56', z: '445'}$.