Which of the following is equal to $latex 5a + 3b -(5b -2) $?

1. $latex 5a $ (check answer)
2. $latex 5a – 2b +2 $ (check answer)
3. $latex 5a – 10b $ (check answer)
4. $latex 5a – 15b^2 – 6b $ (check answer)
5. $latex 8ab – 5b + 2 $ (check answer)

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