45-[38-{60/3-(6-9/3)+4}]

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Solution

45-[38-{60/3-(6-9/3)+4}]

45-[38-{60/3-(-3/3)+4}]
45-[38-{60/3-(-1)+4}]
45-[38-{20+1+4}]
45-[38-25]
45-13
=32.

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