60005 + (36006 − 28097) = 60005 + 7909 = 67914
$\snippet{name: op_column, sign: '-', x: 36006, y: 28097, z: 7909}$
 
$\snippet{name: op_column, sign: '+', x: 60005, y: 7909, z: 67914}$
 
100105 − (87007 − 679) = 100105 − 86328 = 13777
$\snippet{name: op_column, sign: '-', x: 87007, y: 679, z: 86328}$
 
$\snippet{name: op_column, sign: '-', x: 100105, y: 86328, z: 13777}$
 
400 + 80 : 4 * 5 = 400 + 20 * 5 = 400 + 100 = 500
 
800 − 640 : 2 : 4 = 800 − 320 : 4 = 800 − 80 = 720