\"\"

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The expression is  \"\"

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\"\"                           (Substitute \"\")

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\"\"                                (Product of two same signs is positive)

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\"\"                                 (Add: \"\")\"\"

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\"\"                                    (Division rule: \"\") \ \

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\"\"                                        (Multiply: \"\") 

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\"\" \ \  

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\"\"                                  (Multiplynumarator and denominator by 10)                 

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\"\"                                           (Multiply: \"\")    

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 \"\"                                                    (Divide: \"\")          \"\"     

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The  value of expression is \"\"