Запиши частные чисел и выражений

1. \(81\) и \(9 \Rightarrow \) [ ] \( : \) [ ];
2. \(15\) и \(t \Rightarrow \) [ ] \( : \) [ ];
3. \(h + 9\) и \(12 \Rightarrow \) \((\) [ ] \()\) \( : \) [ ];
4. \(21\) и \(6a + 7b \Rightarrow \) [ ] \( : \) \((\) [ ] \()\) ;
5. \(5a + 3\) и \(5a - 3 \Rightarrow \) \((\) [ ] \()\) \( : \) \((\) [ ] \()\) .