Question: need help with these three questions thank you! 1. Simplify, then evaluate the expression. Express your answer in rational form. ( -3 ) + ,-6

need help with these three questions thank you!

1. Simplify, then evaluate the expression. Express your answer in rational form. ( -3 ) + ,-6 2. Simplify the expression. Express your answer with positive exponents. -1 3. Simplify, then evaluate the expression. -2 7-3

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