Simplify the Expression $$\left( \frac { 2 x ^ { - 4 } y ^ { 5 } } { 5 x ^ { 4 } y ^ { - 7 } } \right) ^ { - 3 }$$

question 56

Short Answer

Simplify the expression. Write your answer with positive exponents only. $$\left( \frac { 2 x ^ { - 4 } y ^ { 5 } } { 5 x ^ { 4 } y ^ { - 7 } } \right) ^ { - 3 }$$

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