please answer step by step
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Step-by-step explanation:
3¹⁰/3⁶ × 5⁶/5⁴ × 7³/7²× 5¹
= 3¹⁰–⁶ ×5⁶–⁴ +¹ × 7³-²
3⁴ × 5³ × 7¹
= 81 × 125 × 7
= 70875
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