exam Maths Puzzle Numerical Ability

Please help! I am getting several different solutions. I am lost.
Use the properties of logarithms to condense the logarithmic expression. Write the expression as a single logarithm whose coefficient is 1. Evaluate.
log5 (x + 4) - log5 (x + 1)

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exam Other Question

what is domain x^3 - X^2 - 2x +2/x^2-1 Assume the following statements:
P= The temperature is 70 degrees
Q= It is Raining
R= There is no wind

Find the following statement in word form: Q --> (~R upside down v ~P)