exam Maths Puzzle Numerical Ability

I need help with the following problem.

1/p+1 + 1/p-3 - 4/p2-2p-3

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exam Other Question

I need to evaluate the following expressions:

log of base 5 (0.008)

and

log of base 64 sqrt(4) Word Problem:

If John cleans a house in 8 hours and Julie cleans a similar house in 6 hours, how long should it take them to clean another similar house working together?