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In order to solve this expression using the properties of integer exponents, we need to simplify each term within the expression.
First, we simplify the term within the parentheses: (15−3 ⋅ 47) becomes 15 - (3 ⋅ 47) = 15 - 141 = -126.
Next, we simplify the exponent expression: -12604−3 = -126 × (1/4)^3 = -126 × 1/64 = -1.96875.
Therefore, the equivalent expression is -1.96875, which is closest to the option 164.