45-[38-{60÷3-(6-9÷3)÷3}] = ?
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=45-[38-{60÷3(6-3)÷3}]
=45-[38-{60÷3(3)÷3}]
=45-[38-{60÷9÷3}]
=45-[38-{60÷3}]
=45-[38-20]
=45-18
=27
=45-[38-{60÷3(3)÷3}]
=45-[38-{60÷9÷3}]
=45-[38-{60÷3}]
=45-[38-20]
=45-18
=27
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