exam Maths Puzzle Numerical Ability

x2+5x+6

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My son has statements that he needs to write the inequality using symbols for each statement. thanks in advance

If -2 is added to one-half of a number, the sum is less than 4. So far we have -2 + 1/2n??? Please advise
I don;t know how to do that...

x cubed-27 divided by x cubed-3x squared+2x-6