Since the unknown variable, P, is not in the exponent of this equation, most of this can be dong without actually knowing anything about logs or exponential functions. Most errors happen when people type this into their calculators incorrectly. If in doubt, do it in steps and keep as many decimals as you can: start by simplifying the fraction inside the parentheses, then add one, and then raise that value to a power where the product is in parentheses.
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