exam Maths Puzzle Numerical Ability

Could use some help with this problem. I have to simplify 1/x^2-36/1+6/x-6

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exam Other Question

A coin is tossed 9 times. What is the probability that the coin will land heads at least 7 times? A man has a square garden area with a sidewalk 2 feet wide all around it. If the area of the sidewalk plus garden is 196 square feet, what are the dimensions of the garden area?