Do you follow pemdas while inside the parentheses

Like in 5(3-6 x 9 +56 -3 +5)7
or is it just in the order they come in?

Yes, you do. Pemdas is always relevant, even when you work with variables.

5(3 - 6 x 9 + 56 - 3 + 5)^7
= 5(3 - 54 + 56 - 3 + 4)^7
= 5(-51 + 56 - 3 + 4)^7
= 5(5 - 3 + 4)^7
= 5(2 + 4)^7
= 5(6)^7
= 5 x 279936
= 1399680

yes. Even when you are inside parentheses, you still follow pemdas.

Yes. You follow pemdas inside brackets.

yes