book Maths Puzzle Numerical Ability

(x^3 + 3x^2 +3x +1)/(x+1)
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MUST SHOW WORK!</b>

Solve 5/x-2 - 2/x+2 = 3/x^2-4

I really would appreciate the input of your help!</b> how to do 6(x+2)=5x-9