Вычислите устно:
а) $\snippet{name: op_column_rows, args: ['24 - 9', '* 8', '+ 12', '- 17', ': 9'], solution: '?'}$;
б) $\snippet{name: op_column_rows, args: ['57 - 49', '* 7', '+ 14', '- 28', ': 7'], solution: '?'}$;
в) $\snippet{name: op_column_rows, args: ['66 - 59', '* 7', '+ 17', '- 38', ': 4'], solution: '?'}$;
г) $\snippet{name: op_column_rows, args: ['42 - 33', '* 6', '+ 27', '- 9', ': 8'], solution: '?'}$;
д) $\snippet{name: op_column_rows, args: ['72 - 67', '* 6', '+ 24', '- 20', ': 17'], solution: '?'}$.