Question

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Answer 1

Answer:

$= ({5}^{2} \times {a}^{ - 4} ) \div {5}^{ - 3} \times 10 \times {a}^{ - 8} \\ =( {5}^{2 + 3} \times {a}^{8 - 4}) \div (5 \times 2) \\ = {5}^{4} \times {a}^{4} \div 2$

here is ur answer ........