book Maths Puzzle Numerical Ability

What do the inequality signs mean?

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Could you please help me with these problems. I 'm not sure if I'm doing them right.
1. x^3 > 8

2. x^3-x^2-4x+4 < 0

3. 3x^2-7x+2 < 0
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x+1
4. Assume that a
Reduce fraction to its lowest term

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