Вычислите устно:
а) $\snippet{name: op_column_rows, args: ['4 * 6', '+ 11', ': 15', '* 12', ': 20'], solution: '?'}$;
б) $\snippet{name: op_column_rows, args: ['19 * 3', '- 9', ': 12', '* 25', ': 50'], solution: '?'}$;
в) $\snippet{name: op_column_rows, args: ['32 * 3', ': 48', '* 15', '* 3', ': 45'], solution: '?'}$;
г) $\snippet{name: op_column_rows, args: ['4 * 14', '+ 40', ': 48', '* 35', ': 5'], solution: '?'}$;
д) $\snippet{name: op_column_rows, args: ['2 * 26', '- 7', ': 3', '- 6', ': 5'], solution: '?'}$.