\(-\dfrac{34}{37}\times-\dfrac{74}{85}=\dfrac{-34.-74}{37.85}=\dfrac{-17.2.-37.2}{-1.37.-1.17.5}=\dfrac{-17.2.-37.2}{-37.-17.5}=\dfrac{2.2}{5}=\dfrac{4}{5}\)
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