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$6.45 \times 10 ^ {- 3}$$6.45 \times 10 ^ {3}$0.5$5 \times 10 ^ {5}$$8 \times 10 ^ {3}$$8 \times 10 ^ {6}$$3.2 \times 10 ^ {- 4}$$3.2 \times 10 ^ {- 7}$
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["$6.45 \\times 10 ^ {- 3}$","$6.45 \\times 10 ^ {3}$","0.5","$5 \\times 10 ^ {5}$","$8 \\times 10 ^ {3}$","$8 \\times 10 ^ {6}$","$3.2 \\times 10 ^ {- 4}$","$3.2 \\times 10 ^ {- 7}$"]