a) logx -(log(x-1)^1/2 + log(x+1)^1/2

= logx - 1/2log(x-1) - 1/2log(x+1)

b) assume my answer is all with log base 5

log5^2 + logy^2 - logz^3

= log(25y^2 / z^3)

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