exam Maths Puzzle Numerical Ability

Solve.

3 - a-1/a+2 = a^2-1/a+2


The first number seems to throwing me off, can someone help?

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exam Other Question
input f 13 15 22 33 36

output a 51 49 42 31 28 Find the real and complex solutions to the equation x^3 + 1 = 0.