simplify the question
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(i) (2^5)^2 × 7^3 / (2^3)^3 × 7
= 2^10 × 7^(3-1)/2^9
= 2^(10-9) × 7^2
= 2× 14= 28
(ii) 5^2 × 5^2 × t^8/ (2×5)^3 × t^4
5^(2+2) × t^(8-4)/ 5^3 × 2^3
5^(4-3) × t^4)/8
5t^4/8
(iii) 3^5 × (2×5)^5 × (5)^2/ 5^7 × 6^5
3^5 × 2^5 × 5^5 × 5^2 / 5^7× 6^5
(3×2)^5 × 5^(2+5)/5^7× 6^5
6^5 × 5^7 /5^7 × 6^5
= 1
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