exam Maths Puzzle Numerical Ability

Reduce the fractions to lowest terms.
x^3+x^2+x+1/x^2-1

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exam Other Question

Rationalize the denominator. Which means to get rid of the radical in the denominator.
8/6- squareroot of 15 Can you help me simplify and write the answer in radical form if necessary?
(4 square root of x^2)^5
Thank you