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When multiplying exponents with same base we can add the exponents
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$\left(\frac{a^{-21}b^3}{a^{5}b^4}\right)^{-31}$
Learn how to solve factor problems step by step online. Factor the expression ((a^(-21)b^3)/(a^2a^3b^4))^(-31). When multiplying exponents with same base we can add the exponents. Simplify the fraction by a. Simplify the fraction by b. Since the exponent is negative, we can invert the fraction.