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6^1/4 x 12^3/4=6^1/4 x (2 x 6)^3/4=2^3/4 x 6^(1/4+3/4)=6 x 2^3/4=3 x 2^7/4
2^4/3 ÷ 3^2/3 x 6^2/3=(2^4/3 x 6^2/3)÷ 3^2/3 =(2^4/3 x (2 x 3)^2/3)÷ 3^2/3=2^(4/3+2/3) x 3^2/3÷ 3^2/3=2^2
2^4/3 ÷ 3^2/3 x 6^2/3=(2^4/3 x 6^2/3)÷ 3^2/3 =(2^4/3 x (2 x 3)^2/3)÷ 3^2/3=2^(4/3+2/3) x 3^2/3÷ 3^2/3=2^2
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