Please help me simplify these expressions. 1. (x/y)^-3 2. (4t)^-2 t^0/t^6 v^-8 3. p^-3/p^-2 r^3 4. (5x-7)^2



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1.  ` (x/y)^-3`

According to the negative exponent rule `a^-n=1/a^n` , this says that negative exponents in the numerator get moved to the denominator and become positive exponents.




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  This is the required answer.


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