exam Maths Puzzle Numerical Ability

please help with factoring the following: d+2/6 - d-4/15=

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exam Other Question

angle BFA and angle DFE are vertical angles. If angle BFA=3r+12 and the measure of angle DFE=-8r+210, what is the measure of angle AFE? If k(r)=7-4r, find k(1+h)-k(1)
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