\"\"

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The expression is \"\".

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\"\"                             (Substitute a = 3, b = 0.3 , c =\"\", d = \"\")

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First operation is Multiplication.

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

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\"\"                              (Subtract: \"\")

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Since nNumerator is zero the expression value becomes zero.

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 \"\"

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 \"\"

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The value of the expression is 0.