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Brackets are used in Python logical formulas to group certain expressions and determine the order of evaluation. Follow these guidelines to add brackets to your logical formulas:

1. Use brackets to group expressions that should be evaluated first. For example, if you have the expression 2 + 3 * 4, you can use brackets to indicate that the multiplication should be done first: 2 + (3 * 4).
2. Use brackets to group expressions that should be evaluated together. For example, if you have the expression a or b and c, you can use brackets to indicate that b and c should be evaluated first: a or (b and c).
3. Use brackets to make your code more readable. Even if the use of brackets is not strictly necessary, it can help to make your code more clear and easy to understand.

Some examples of where you might add brackets to a Python logical formula include:

• (x > 5) and (y < 10)
• not (a == b or c < d)
• (a + b < 10) or (c - d == 0)

In general, the key is to think about the order of evaluation and use brackets to group expressions together in the way that makes the most sense.