$602 \overset{1}{-} 386 \overset{2}{-} 59 \overset{3}{+} 124 = 216 - 59 + 124 = 157 + 124 = 281$
1) 602 − 386 = 216
$\snippet{name: op_column, sign: '-', x: '602', y: '386', z: '216'}$
2) 216 − 59 = 157
$\snippet{name: op_column, sign: '-', x: '216', y: '59', z: '157'}$
3) 59 + 124 = 281
$\snippet{name: op_column, sign: '+', x: '157', y: '124', z: '281'}$
 
$(602 \overset{1}{-} 386) \overset{3}{-} (59 \overset{2}{+} 124) = 216 - 183 = 33$
1) 602 − 386 = 216
$\snippet{name: op_column, sign: '-', x: '602', y: '386', z: '216'}$
2) 59 + 124 = 281
$\snippet{name: op_column, sign: '+', x: '124', y: '59', z: '183'}$
3) 216 − 183 = 33
$\snippet{name: op_column, sign: '-', x: '216', y: '183', z: '33'}$
 
$602 \overset{2}{-} (386 \overset{1}{-} 59) \overset{3}{+} 124 = 602 - 327 + 124 = 275 + 124 = 399$
1) 386 − 59 = 327
$\snippet{name: op_column, sign: '-', x: '386', y: '59', z: '327'}$
2) 602 − 327 = 275
$\snippet{name: op_column, sign: '-', x: '602', y: '327', z: '275'}$
3) 275 + 124 = 399
$\snippet{name: op_column, sign: '+', x: '275', y: '124', z: '399'}$
 
$602 \overset{3}{-} (386 \overset{1}{-} 59 \overset{2}{-} 124) = 602 - (327 - 124) = 602 - 203 = 399$
1) 386 − 59 = 327
$\snippet{name: op_column, sign: '-', x: '386', y: '59', z: '327'}$
2) 327 − 124 = 203
$\snippet{name: op_column, sign: '-', x: '327', y: '124', z: '203'}$
3) 602 − 203 = 399
$\snippet{name: op_column, sign: '-', x: '602', y: '203', z: '399'}$