Below is an instruction that describes a task. Write a response that appropriately completes the request.

### Instruction:
What is the highest Goal Difference when the goals against were less than 76, and the position larger than 5, and a Played larger than 30?

### Inputs:
table_name: table, columns: ['Position', 'Club', 'Played', 'Points', 'Wins', 'Draws', 'Losses', 'Goals for', 'Goals against', 'Goal Difference']

### Response:
SELECT MAX Goal Difference FROM table WHERE Goals against < 76 AND Position > 5 AND Played > 30