exam Maths Puzzle Numerical Ability

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Simplify: (-4 + x2 + 2x3) - (-6 - x + 3x3) - (-6y3 + y2)

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exam Other Question

Find the range of the relation { (-2,3), (-1,3), (-1,5) }, Then determine whether the relation is a function. Can you help me solve this problem: -2xsquared-5x-5
-(-5xsquared+3x-3)