exam Maths Puzzle Numerical Ability

x^2+3x+2 x^2+5x+4
/ _

x^2+7x+12 x^2+5x+6

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exam Other Question

Divide the following fractions.

16x/4x^2-16 divided by 4x-24/x^2- 4x -12 Evaluate (1/5+2/7)(9/35-1/5)

I got 34/1225 for my answer but am not sure if it has to be simplified further or not.
Thank you.