exam Maths Puzzle Numerical Ability

a^2-a-6/a^2-9*a^2+7a+12/a^2+4a+4

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exam Other Question

34=-48-m A salesperson drove 238, 159, 87, 163, and 198 miles (mi) on a 5-day
trip. What was the mean number of miles driven per day?
Help!!! I add these all together then divide by the numbers added? (5)