Use law of logarithms to combine expression>>?

3(log_5 x + 3 log_5 y - 5 log_5 z) = 3 log_5 x + 9 log_5 y - 15 log_5 z = log_5 x^3 + log_5 y^9 - log_5 z^15 = log_5 (x^3y^9/z^15)