exam Maths Puzzle Numerical Ability

i dont know how to solve any of these problems..i really need help..i cant fail math..please help i have a 5 grade test

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exam Other Question

Are all real numbers also complex numbers? Are all complex numbers also real numbers? Simplify: No negative exponents and no decimal answers.
(27a^3b^2c^5/45a^4c^2)^3