How many statements are always true?

\(\log_{2} (x^{45}) = 45\log_{2} (x)\)

\(\log_{2} xy = \log_{2} x + \log_{2} y\)

\(\log_{3}x = \dfrac{1}{\log_{x}3}\)

\(\log_{3}8 = \dfrac{\log_{156}8}{\log_{156}3}\)

\(x\) is a real number not equal to \(0\).

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