exam Maths Puzzle Numerical Ability

please help simplify x^2+2x/x^2+4x+4-x^2+x-2/x^2+4x+4

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6. (5 points)
A semiconductor manufacturer seeks to maximize its profits. Testing indicates that they can produce 100,000 chips per week at a cost of $40 per chip, and sell th PLEASE HELP ASAP
In using mathematical induction to prove 8+10+12+...+(2n+6) = n^2+7n, the P k+1 statement is 8+10+12+...+(2k+6) = (k+1)+7(k+1)
Is this true or false
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