exam Maths Puzzle Numerical Ability

given: f(x)-1/x and g(x)=2/x^2 find f+g(-3)

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Luis is 10 years older than his brother. Next year, he will be three times as old as his brother. How old is Luis now and What will the brothers age be next year? how do i work out a formula when asked the question "i played 34 basketball games and won 8 more than i lost,...how many games did i win
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