Write the algebraic expression for the following.. :

1. 3 more than a number divided by 8 = ?
   
   
2. Seven times a number plus 25 = ?
   
   
3. A number divided by two plus 3 times another number = ?
   
   
4. The difference in a number and 12 = ?
   
   

Please answer ALL of the following! :)) Thanks!