book Maths Puzzle Numerical Ability

Multipy the rational expression. Simplify the result.

(x^2 - 2x/x^2 + 2x + 1) * (x^2 + 4x + 3/x^2 + 3x)

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book Other Question

Please show the similarities between dividing two fractions and dividing two rational expressions using examples of each; explain your steps.

Thanks for your help! I NEED HELP WITH:
(x^2 - 3x + 5)+(x^2 + 2x - 3)