$136 \overset{2}{*} (668 \overset{1}{-} 588) \overset{4}{-} 404 \overset{3}{*} 25 = 136 * 80 - 404 * 25 = 10880 - 10100 = 780$
1) $\snippet{name: op_column, sign: '-', x: '668', y: '588', z: '421'}$;
2) ;
3) $\snippet{name: column_multiplication, x: 404, y: 25}$;
4) $\snippet{name: op_column, sign: '-', x: '10880', y: '10100', z: '780'}$.

$1540 \overset{1}{:} 11 \overset{3}{+} 1890 \overset{2}{:} 9 \overset{4}{+} 982 = 140 + 210 + 982 = 350 + 982 = 1332$
1) $\snippet{name: long_division, x: 1540, y: 11}$;
2) $\snippet{name: long_division, x: 1890, y: 9}$;
3) $\snippet{name: op_column, sign: '+', x: '140', y: '210', z: '350'}$;
4) $\snippet{name: op_column, sign: '+', x: '350', y: '982', z: '1332'}$.

$1953 \overset{4}{+} (17432 \overset{2}{-} 56 \overset{1}{*} 223) \overset{3}{:} 16 = 1953 + (17432 - 12488) : 16 = 1953 + 4944 : 16 = 1953 + 309 = 2262$
1) $\snippet{name: column_multiplication, x: 223, y: 56}$;
2) $\snippet{name: op_column, sign: '-', x: '17432', y: '12488', z: '4944'}$;
3) $\snippet{name: long_division, x: 4944, y: 16}$;
4) $\snippet{name: op_column, sign: '+', x: '1953', y: '309', z: '2262'}$.

$6010 \overset{4}{-} (130 \overset{1}{*} 52 \overset{3}{-} 68890 \overset{2}{:} 83) = 6010 - (6760 - 830) = 6010 - 5930 = 80$
1) ;
2) $\snippet{name: long_division, x: 68890, y: 83}$;
3) $\snippet{name: op_column, sign: '-', x: '6760', y: '830', z: '5930'}$;
4) $\snippet{name: op_column, sign: '-', x: '6010', y: '5930', z: '80'}$.